Maintenance of Supplies and Equipment

Army Materiel Maintenance Policy

By Order of the Secretary of the Army:

JAMES C. MCCONVILLE
General, United States Army
Chief of Staff

MARK F. AVERILL
Administrative Assistant to the
Secretary of the Army

History. This publication is a major revision. The portions affected by this major revision are listed in the summary of change.

Authorities. The authorities for this regulation are DoDD 4151.18, DoDI 4151.22, and DoDM 4151.22.

Applicability. This regulation applies to the Regular Army, the Army National Guard/Army National Guard of the United States, and the U.S. Army Reserve, unless otherwise stated. This regulation also applies to the maintenance of all materiel owned or supported by the Army; except materiel purchased with non-appropriated funds in accordance with AR 215–1. It is also applicable to special intelligence property, real property, foreign materiel used for training, leased/rented materiel (unless the lease and/or rental agreement dictates otherwise), medical, materiel maintenance in accordance with AR 12–1; and those aspects of combat and materiel development that impact the materiel maintenance function. The provisions of this regulation are applicable to all Army and civil-funded property under the direct control of the U.S. Army Corps of Engineers.

Proponent and exception authority. The proponent on this regulation is the Deputy Chief of Staff, G–4. The proponent has the authority to approve exceptions or waivers to this regulation that are consistent with controlling law and regulations. The proponent may delegate this approval authority, in writing, to a division chief within the proponent agency or its direct reporting unit or field operating agency, in the grade of colonel or civilian equivalent. Activities may request a waiver to this regulation by providing justification that includes a full analysis of the expected benefits and must include formal review by the activity's senior legal officer. All waiver requests will be endorsed by the command or senior leader of the requesting activity and forwarded through their higher headquarters to the policy proponent. Refer to AR 25–30 for specific requirements.

Army internal control process. This regulation contains internal control provisions in accordance with AR 11–2 and identifies key internal controls that must be evaluated (see appendix B).

Suggested improvements. Users are invited to send comments and suggested improvements on DA FormDA FormDepartment of the Army form 2028 (Recommended Changes to Publications and Blank Forms) directly to the Deputy Chief of Staff, G–4 (DALO–MP), 500 Army Pentagon, Washington, DC 20310–0500.

Distribution. This regulation is available in electronic media only and is intended for the Regular Army, the Army National Guard/Army National Guard of the United States, and the U.S. Army Reserve.

*This publication supersedes AR 750-1, dated 28 October 2019.
AR 750–1 • 2 February 2023
UNCLASSIFIED

Diagnostic Measurement Systems

Accountable property system of record The government system used to control and manage accountable property records. A subset of existing organizational processes related to the lifecycle management of property; the system that is integrated with the core financial system.

Adjust and/or align To maintain or regulate an item, within prescribed limits, by bringing it into proper position or by setting the operating characteristics to specified parameters.

Administrative deadline Procedure for taking equipment out of service if the commander or FLM officer determines it is necessary. Administratively deadlined equipment is FMC in accordance with the applicable PMCS tables, AR 385 – 10, and is reported FMC in accordance with AR 700 – 138 and DA PamDA PamDepartment of the Army Pamphlets 750 – 8 but is not used or dis- patched. The following conditions are examples of typical situations (not an all-inclusive list) when admin- istrative deadline of equipment would apply: regulations if the equipment were dispatched or used.

Advanced manufacturing Advanced manufacturing refers to new ways to manufacture existing products and the manufacture of new products resulting from advances in technology. Advanced manufacturing depends on use and coor- dination of information, automation, computation, software, sensing, and networking, and making use of cutting-edge materials and emerging capabilities enabled by the physical and biological sciences. Ad- vanced manufacturing includes, but is not limited to, additive manufacturing (also known as three-dimen- sional (3D) printing), artificial intelligence, robotics, and advanced composite materials.

After operation checks PMCS performed in accordance with the TM- and/or ETM – 10 series PMCS tables at the conclusion of the mission to identify and correct faults that will preclude the next mission and to maintain the equipment to TM – 10 series and TM – 20 series PMCS maintenance standard. Faults that render the equipment NMC and are within the authorized level of repair of the operator and/or crew to correct must be corrected im- mediately. Faults above the operator and/or crew-authorized level of repair are immediately reported to field maintenance for correction prior to start of the next mission. Field maintenance performs unsched- uled correction required by reports from operator and/or crew and performs required services in accord- ance with TM- and/or ETM – 20 series to maintain the equipment to the TM – 10 series and TM – 20 series PMCS maintenance standard.

Ammunition All Army-adopted class V items.

Ammunition peculiar equipment Equipment used in depot to perform maintenance, surveillance, demilitarization, or preservation/packag- ing work on ammunition.

Area maintenance support activity Provides, on an assigned geographical area basis, technical assistance, and unit maintenance support beyond the supported units' capabilities to accomplish during scheduled training assemblies. AMSA will be designated as follows: craft.

Army aviation flight activity An ARNGARNGArmy National Guard TDATDATables of distribution and allowances activity that provides FLM functions in support of ARNGARNGArmy National Guard aviation assets.

Army aviation operating facility An ARNGARNGArmy National Guard TDATDATables of distribution and allowances activity that provides FLM functions.

Army aviation support facility An ARNGARNGArmy National Guard TDATDATables of distribution and allowances maintenance activity that provides field- and AVCRAD-authorized sustainment-level maintenance functions to support ARNGARNGArmy National Guard aviation assets.

Army Oil Analysis Program HQDA directed program to enhance crew safety, improve equipment readiness and reduce the consump- tion of resources through application advanced diagnostic technology to detect premature materiel degra- dation and support failure trend analysis.

Army oil analysis program evaluation criteria Factors, including quantitative metal wear expressions, against which the results of oil analysis are com- pared to determine the condition of a component or lubricant and the necessity for maintenance.

Assembly A combination of components and/or modules and parts used as a portion of, and intended for, further installation in an equipment end item (for example, engine, transmission, rotor head, electronic chassis, rack, and/or cabinet).

Associated support items of equipment An end item required to support the operation, maintenance, and/or transportation of a BOIP item. Asso- ciated support items of equipment (ASIOE) is listed on the BOIP of the item it supports. ASIOE has its own LINLINLine identification number and is separately documented into TOETOETable(s) of Organization and Equipment and/or Vertical—The Army Authorization and Docu- ments System.

Automatic test equipment Equipment designed to automatically evaluate the degree of unit under test performance degradation. It may be used to perform fault isolation of unit under test malfunctions.

Available days The hours equipment is on hand in an organization and fully able to do its mission; the time that equip- ment is FMC.

Aviation classification and repair activity depot An ARNGARNGArmy National Guard TDATDATables of distribution and allowances maintenance activity that provides AVIM and authorized depot-level functions.

Aviation support facility TDATDATables of distribution and allowances activity of USARCUSARCUnited States Army Reserve Command that exercises centralized control and assures proper use and operation of USARUSARUnited States Army Reserve aviation assets, providing aviation training and logistics support beyond the capability of the supported units during training assemblies.

Battle damage assessment and repair A wartime procedure to rapidly return disabled equipment to operational condition by expediently repair- ing, substituting, fabricating, short-cutting, bypassing, cannibalizing, or jury-rigging components to restore the minimum essential systems required for the support of a specific combat mission or to enable equip- ment to self-recover.

Before operation checks Checks performed by the operator and/or crew in accordance with TM and/or ETM – 10 series PMCS ta- bles to identify faults that will prevent performance of the mission and must be corrected prior to start of the mission. All faults are corrected or, if above operator and/or crew authorized level of repair, are re- ported to field maintenance before the mission.

Built-in test A test approach using built-in test equipment or other integral hardware designed into equipment or com- ponents under test to self-test and fault diagnose all and/or part of the equipment or component under test.

Built-in test equipment Any identifiable, removable device that is part of equipment or components under test that is used for the express purpose of testing.

Calibration Comparison of an instrument with an unverified accuracy to an instrument of known or greater accuracy to detect and correct any discrepancy in the accuracy of the unverified instrument.

Cannibalization The authorized removal of components from materiel designated for disposal. Cannibalization supple- ments supply operations by providing assets not immediately available through the Army supply system. Costs to cannibalize, urgency of need, and degradation to resale value of the end item should be consid- ered in the determination to cannibalize.

Capability A measure of operational performance to quantify contribution to the warfighter. Measure consists of an evaluation of range, lethality, and effectiveness.

Combined support maintenance shop An ARNGARNGArmy National Guard TDATDATables of distribution and allowances activity that provides field- and sustainment-levels of maintenance on Federal surface equipment issued to the ARNGARNGArmy National Guard.

Commercial activities Army-operated and Army-managed organizations that provide products or services that may be obtained by contract with private commercial sources. Commercial activities may be identified with an organization or a type of work but must be separate facilities that can perform either in house or by contract. Further, the commercial activities must provide products and services regularly needed. Commercial activities will not provide products and services that will be used only once, for a short time, or for support of a special project.

Communications security logistics support unit Field and/or sustainment maintenance activity for the maintenance of COMSECCOMSECCommunications security equipment.

Compliance Compliance refers to the first phase of the process to qualify national maintenance providers. A national SOR is compliant once the NMM determines it has a documented quality management system in place. Continued compliance is determined by annual surveillance audits.

Component and/or module A combination of parts mounted together during manufacturing that may be tested, replaced as a unit, or repaired (for example, starter, generator fuel pump, and printed circuit board (PCB)). The term “module“ is normally associated with electronic equipment.

Condition based maintenance CBM is a set of maintenance processes and capabilities derived primarily from real-time assessment of weapon system condition obtained from embedded sensors and/or external test and measurements using portable equipment.

Configuration The functional/physical characteristics of hardware and/or software set forth in technical documentation and achieved in a product.

Configuration status accounting Recording and reporting of information needed to manage the configuration of a system or item effec- tively, including the approved technical documentation as set forth in specifications, drawings, and associ- ated lists and documents referenced therein; the status of proposed changes to a configuration; and the implementation status of approved changes.

Contract maintenance Any materiel maintenance operation performed under contract by commercial organizations (including the original manufacturers of the materiel).

Controlled exchange Removal of serviceable parts, components, and assemblies from unserviceable, but economically repair- able, equipment and their immediate reuse in restoring a like item of equipment to a combat mission ca- pable condition.

Critical characteristics Features (tolerance, finish, material composition, manufacturing, assembly, or inspection process) of a product, material, or process that, if nonconforming or missing, could cause the failure or malfunction of the item.

Critical safety item Any part, assembly, subassembly, installation procedure, or production process that would have hazard probability level A, B, C, or D chance of resulting in an unsafe condition if not in accordance with design data or quality requirements.

Deferred maintenance Authorized delay of maintenance and/or repair of uncorrected faults.

Deficiency A fault or problem that causes equipment to malfunction. Faults that make the equipment NMC are defi- ciencies.

Department of Defense activity address code A six-digit code that gives a DoD delivery address for supplies and equipment.

Depot maintenance activity An industrial-type facility established to perform depot maintenance on weapon systems, equipment, and components. The term includes DoD installations and commercial contractors.

Depot maintenance capability The availability of resources (facilities, tools, test equipment, drawings, technical publications, training, maintenance personnel, engineering support, and spare parts) required to carry out a specified depot maintenance task.

Depot maintenance capacity This is the amount of direct labor hours (maintenance man-hours) that can be applied within a specified industrial facility or other entity during a 40-hour week.

Depot maintenance core capability Depot maintenance core is the capability maintained within defense depots to meet readiness and sus- tainability requirements of the weapon systems that support the JCSJCSJoint Chiefs of Staff scenario(s). Core capability exists to minimize operational risks and to guarantee required readiness for weapon systems. It will comprise only the minimum essential required facilities, equipment, and skilled personnel required to ensure a ready and controlled source of required technical competence.

Depot maintenance public private partnership A public-private partnership for depot maintenance agreement may exist between an organic depot maintenance activity and one or more private industry or other entities to perform work or use facilities and equipment. Program offices, inventory control points, and materiel, systems, and/or logistics com- mands may also be parties to such agreements or be designated to act on behalf of organic depot maintenance activities.

Depot maintenance work requirement A maintenance serviceability standard for depot-level reparables designated for repair and return to AWCF stock. It prescribes the statement of work to be performed on an item by organic depot mainte- nance facilities or contractors, and/or qualified below-depot sources of repair; types and kinds of materiel to be used, and quality of workmanship. The DMWR also addresses repair methods, procedures and techniques, modification requirements, fits and tolerances, equipment performance parameters to be achieved, quality assurance discipline, and other essential factors to ensure that an acceptable and cost- effective product is obtained.

Depot maintenance workload A specific depot repair requirement for a specific item to be repaired. Units of measure include manhours, work years, costs, and sale prices.

Depot-level reparable A class IX item with an MRC of D or L.

Discard and replace Procedure to follow if selected items are designated as nonrepairable and become inoperable.

During operations checks Checks performed by the operator and/or crew in accordance with the TM and/or ETM – 10 series PMCS tables that monitor operation of equipment and identify faults in equipment performance during the mis- sion. Faults that render the equipment NMC require immediate correction or authorization for limited oper- ation using circle x status condition. All other faults are corrected (if above operator and/or crew author- ized level of repair to correct) or reported during or after the mission.

Electromagnetic environmental effect Any failure (or serious effect) apparently caused by, or related to, radio waves, electromagnetism, volt- age, or current pulses (static discharge, lightning, electromagnetic pulse, or transient electricity), from whatever source.

End item code The end item code is a 3-position alphanumeric code assigned to each end item managed or used by the Army, which meets all the following criteria: 700 – 142.

Equipment category code A two-position alphabetical code. The first letter identifies the primary category of equipment. The two- position equipment category code is used in automated data processing systems to produce the complete description of an item of equipment by make, model, noun nomenclature, line number, and NSNNSNNational Stock Number if desired or required. It is also entered in specified blocks or positions on manually produced data source docu- ments.

Equipment concentration site Area for equipment storage and support to USARUSARUnited States Army Reserve and other authorized units during IDTIDTInactive duty training, AT, and mobili- zation; includes a maintenance and storage branch.

Equipment end item A final combination of assemblies, components, modules, and parts that is designed to perform an opera- tional function and is ready for intended use. These end items are normally type classified and assigned line item identification numbers (EM 0007 FED LOG) but may require other end items to perform a mis- sion (for example, tank, truck, radio, generators, and machine guns).

Equipment improvement recommendation Written reports on an SF 368 to report equipment faults in design operations and manufacturing of new equipment received that is below standard quality in workmanship under AR 702 – 7 and AR 702 – 7 – 1.

Equipment performance data Historical information relating to the maintainability, reliability, and supportability characteristics of sys- tems, subsystems, and components of weapons and equipment end items accumulated during their oper- ational application or tests simulating actual operations.

Equipment readiness code A one-digit code explaining an item’s importance to a unit’s combat, combat support, or service support mission. The codes are assigned to items on MTOEs.

Equipment services Specified maintenance actions performed on equipment, components, and systems when required, in- cluding providing routine checks, adjustments, changes, analysis, and lubrication, in accordance with de- signer and engineer specifications.

Failure The event, or inoperable state, in which any item or part of an item does not, or would not, perform as previously specified.

Fault A term used to indicate that a piece of equipment has a deficiency or shortcoming.

Fault isolation Test performed to isolate faults within a piece of equipment.

Fault repair The process used by operators and maintenance personnel to restore an equipment item to full function- ality as originally designed or engineered.

Feet management Fleet Management is the administrative approach to organize, coordinate, and oversee routine and ad hoc system maintenance to improve efficiency and reduce cost. The fleet manager is the individual on written orders responsible for: maintaining knowledge and utilization of all fleet information and user feed- back to forecast new maintenance requirements, arrange staff to provide support, maintain and monitor data management systems to organize fleet maintenance activities based on mission demands, monitor fuel requirements, develop and implement operational standards to maintain best practices, and plan and prepare an annual budget that accounts for all expenditures against financial objectives.

Field maintenance Field maintenance is the first operation of the Army Maintenance System. Field maintenance is character- ized by the performance of maintenance tasks “on system” in a tactical environment using trained person- nel, tools, and TMDE. Field maintenance is typically operator and/or crew maintenance and repair and return to user maintenance operations.

Field maintenance activity A USARUSARUnited States Army Reserve and/or ARNGARNGArmy National Guard activity that provides field maintenance for Federal surface equipment issued to supported units.

Field maintenance sub-activity A USARUSARUnited States Army Reserve and/or ARNGARNGArmy National Guard FLM sub-facility established to supplement limited available workspace authorized a parent FMSFMSFinancial management specialist or geographic separation of supported units.

Fleet planning Fleet plans provide a common operational picture for all impacted stakeholders of a weapon system's age, capability (protection/payload/performance), and affordability. Fleet plans may involve proactive plans for independent or concurrent efforts to buy new assets (Procure), modernize an existing fleet (Up- grade), increase maintainability, reliability, supportability, and/or survivability (Improve), repair assets to TM – 10/20 (Reset), repair assets to zero-miles/zero-hours (RECAP), or remove assets from the Army in- ventory (Divest).

Focused recapitalization Rebuilding and upgrading systems to the extent determined necessary through detailed engineering and economic analyses.

Forward support maintenance Maintenance oriented toward quick turnaround to the user to maximize combat time by minimizing repair and evacuation time.

Full recapitalization Rebuilding and upgrading systems to the extent required to meet the recapitalization standard.

Fully mission capable A materiel condition indicating that systems and equipment are safe and have all mission-essential sub- systems installed and operating as designated by applicable AR. An FMC vehicle or system has no faults that are listed in the “not FMC ready if ” columns of the TM/ETM XX – 10 and XX – 20 series PMCS tables and AR 385 – 10 provisions that apply to the vehicle and/or system or its sub-system required by AR 700 – 138. The terms ready and/or available and FMC refer to the same status: equipment is on hand and able to perform its combat missions.

General support forces Training, logistics, and other support activities of the CONUSCONUSContinental United States base; field activities; administrative head- quarters and forces provided for peacetime-peculiar activities. Units/activities included in general support forces do not report status/readiness under AR 220 – 1. They are identified in DA Force Accounting Sys- tem by a three-position force planning code beginning with a C.

General-purpose test, measurement, and diagnostic equipment TMDE that is used or possesses the potential to be used without significant modifications for test, meas- urement, and diagnosis of a range of parameters for two or more items of equipment or systems.

Go/no-go (system) Condition or state of operability of a system that can have only two parameters: alarms, sensors, or similar mechanisms.

Hardness assurance Processes, procedures, and methodologies applied in the preproduction and production phases of the acquisition cycle to achieve nuclear hardness.

Hardness maintenance Comprehensive procedures that are applied during the post-production phase of the acquisition cycle to ensure that the designated hardness does not degrade.

Hardness surveillance Periodic tests, analysis, and inspections performed at the system level throughout a system’s life cycle to monitor hardness integrity.

Home station training equipment A pool of theater-unique equipment specifically authorized by HQDA to be prepositioned at selected in- stallations to support training requirements for equipment that would otherwise not be available to deploy- ing units. HST provides deploying units with standard and nonstandard equipment for individual and col- lective training that duplicates the equipment they will use in the theater.

Initial operating capability First attainment by the MTOEMTOEModification table of organization and equipment unit of the capability to operate and support effectively in their operational environment a new, improved, or displaced Army Materiel System.

Inspection To determine the serviceability of an item by comparing its physical, mechanical, and/or electrical charac- teristics with established standards through examination.

Installation materiel maintenance activity TDATDATables of distribution and allowances maintenance organization set up to provide field and/or sustainment maintenance support for troop and/or installation operating equipment. An IMMA operates at one or more fixed locations.

Installed building equipment IBE includes items of real property affixed to or built into a facility that are an integral part of the facility.

Integrated logistics support A composite of all the support considerations necessary to ensure the effective and economical support of a system for its life cycle. ILS is an integral part of all aspects of system acquisition and fielding. The principal elements of ILS related to the overall system life cycle are contained in AR 700 – 127.

Integrated materiel manager The materiel manager responsible for the execution of assigned materiel management functions for se- lected items or selected Federal supply classification classes.

Inter-Service maintenance support Maintenance operations performed by the organic maintenance capability of one military Service in sup- port of another military Service.

item unique identification A system of marking items delivered to the DoD with UIIs that have machine-readable data elements to distinguish an item from all other like and unlike items. UIIs assigned to items are registered in the DoD IUID Registry.

Left behind equipment Maintenance significant items on the unit APSR that remains at home station after the unit deploys. LBE is accounted for and sustained at home station until the unit returns or is redistributed in support of HQDA equipping priorities, or as otherwise directed by the ACOMACOMArmy service component command, ASCCASCCArmy service component commander, or DRUDRUDirect reporting unit to which it is assigned. The ASC assumes accountability and responsibility for the equipment and ensures that it is properly ac- counted for and maintained to support the SRMSRMSustainment, restoration, and remodernization process.

Line item number A six-position alphanumeric number that identifies the generic nomenclature of specific types of equip- ment. Standard LINs consist of one alpha character followed by five numeric characters. Standard are assigned by the AMCAMCU.S. Army Materiel Command and are listed in EM 0007 FED LOG.

Line replaceable unit A combination of components and/or modules installed in an item of equipment or system that is replace- able in the operational environment (that is, under field or combat conditions). An LRU may be a PCB, black box, component, major component, alternator, carburetor, avionics, tank engine, and road wheel assembly installed weapons. This repair by replacement is normally accomplished as far forward as pos- sible by unit (organizational) maintenance personnel.

Logistic Readiness Center/Army Field Support Battalion The LRC/AFSBn provides global logistical support to individual Soldiers and units assigned to or mobilize units. The LRC/AFSBn manages installation supply, maintenance, and transportation to include food ser- vice, ammunition supply, clothing issue facilities and clothing initial issue points, hazardous material, bulk fuel, personal property and household goods, passenger travel, nontactical vehicles, rail, and garrison equipment.

Logistics information system Legacy automated systems used to communicate with other units on vertical and horizontal flow of logis- tics and maintenance information and status.

Maintainability Characteristics of design that inherently provide for the retention of and/or restoration of a specified condi- tion within a given period when maintenance is performed by prescribed procedures and resources.

Maintenance All actions necessary for retaining an item in or restoring it to a specified condition.

Maintenance capability Availability of those resources—facilities, tools, TMDE, drawings, technical publications, trained mainte- nance personnel, engineering and management support, and repair parts—required to perform mainte- nance operations.

Maintenance capacity A quantitative measure of maintenance capability usually expressed as the number of man-hours or di- rect labor that can be applied within a specific maintenance activity or shop during a 40 hour-week (one shift, 5 days).

Maintenance concept The maintenance concept briefly defines the intended maintenance workload distribution within the Army Maintenance System and the force structure required to maintain the end item or weapon system. It is largely based on the organization and operation plan and is an integral portion of the logistics section of the requirement document.

Maintenance engineering The application of techniques, engineering skills, and effort organized to ensure that the design and de- velopment of weapon systems and equipment provide adequately for their effective and economical maintenance.

Maintenance operations The management and physical performance of those actions and tasks involved in servicing, repairing, testing, overhauling, modifying, calibrating, modernizing, and inspecting materiel in the operational inven- tory and the provision of technical assistance to equipment users in support units of the Army Logistics System.

Maintenance parts explosion A process/system that provides the information necessary to accomplish the functional mission required in forecasting repair parts requirements for depot-level, inhouse, contract, and cross-service maintenance programs worldwide. This process also provides data to be used in computing supply central studies and planning depot-level maintenance.

Maintenance significant item and/or materiel An end item, assemblage, component, or system intended for issue to the Army in the field that will re- quire corrective maintenance services on a recurring basis. End items, assemblages, components, or systems that require maintenance while in storage; generally, these are LINs contained within the Army MMDF.

Maintenance standard A measure that specifies the minimum condition to which materiel must be restored by repair, overhaul, or some other maintenance function to ensure its satisfactory performance for a specified period of service.

Maintenance support team A team formed from the resources of a maintenance activity, organization, or unit and specifically tailored to provide maintenance support to a designated unit or operation for specified tasks.

Maintenance technician Full-time technician normally having dual status as a member of a USARUSARUnited States Army Reserve or ARNGARNGArmy National Guard unit; military techni- cian assigned to a USARUSARUnited States Army Reserve or ARNGARNGArmy National Guard TDATDATables of distribution and allowances maintenance activity.

Major assembly Separately identified by type, model, and series and assigned item identification number (EM 0007 FED LOG). For example, receivers or receiver transmitters in radio sets and machine guns or other weapons in secondary armaments subsystems of combat vehicles.

Materiel change Configuration change involving substantial engineering and testing efforts on major end items to increase system/combat effectiveness or extend the useful military life.

Materiel developer The principal Army MATDEVs are the Army PEOs and/or PMs. For non-PEOPEOProgram executive office(r) and/or PM-managed sys- tems, other MATDEVs include AMCAMCU.S. Army Materiel Command, U.S. Army Information Systems Command, INSCOMINSCOMU.S. Army Intelligence and Security Command, Chief of Engi- neers, TSGTSGThe Surgeon General of the Army, and Strategic Defense Command.

Materiel maintenance The function of sustaining materiel in an operational status, restoring it to a serviceable condition, or up- dating and upgrading its functional usefulness through modification or other alteration.

Mean time between failure A basic measure of reliability. The average number of failures of a specific item occurring during a speci- fied time interval.

Mean time to repair A basic measure of maintainability. The sum of corrective maintenance times at any specific level of re- pair, divided by the total number of failures within an item repaired at that level, during a interval under stated conditions.

Medical equipment (including dental and veterinary items) Consists of devices used in the medical diagnosis, therapy, and treatment of injury or disease. This equipment consists primarily of Federal Supply Catalog 6500 items that are standardized by the Defense Medical Standardization Board and are procured by the appropriate acquisition agency for TSGTSGThe Surgeon General of the Army to imple- ment health service support for the Army. It also consists of similar commercial, nonstandard items, ap- proved by the Food and Drug Administration and marketed as medical devices, used to provide state-of- the-art patient care. The equipment is maintained and repaired by trained BES.

Medical standby equipment program Medical assets used in support of critical health care equipment; includes end items, components, or as- semblies used to provide supported activities with serviceable items to replace unserviceable, economi- cally reparable items.

Mission-essential materiel That materiel authorized and assigned to approved combat and combat support forces that should be im- mediately employed to: destroy the enemy or its capacity to continue war; provide battlefield protection of personnel; communicate under war conditions; detect, locate, or maintain surveillance over the enemy; and permit contiguous combat transportation and support of forces and materiel. Equipment assigned to training missions of the same type and configuration as that assigned to combat and combat support forces and designated to be immediately employed for the purposes enumerated above is also mission- essential materiel.

Mobile contact team USARUSARUnited States Army Reserve field maintenance personnel and AMSA and/or ECS maintenance technicians who visit units to provide technical assistance, make inspections, and perform maintenance when this procedure is more economical than transporting equipment or personnel to the activity.

Mobilization and training equipment site An ARNGARNGArmy National Guard TDATDATables of distribution and allowances maintenance facility which, when collocated with a CSMS, provides full-time field support to ARNGARNGArmy National Guard equipment assigned to the site. When not collocated, MATES provide field and sustainment support to equipment and units assigned.

Modernization Modernization is the development and/or procurement of new systems with improved warfighting capabili- ties. The Army’s recapitalization effort does not encompass modernization.

Module An assembly containing a complete self-contained circuit or sub-circuit. It may consist of a single PCB; in which case it is synonymous with a PCB or may comprise two or more PCBs mechanically attached to one another and removable from the next high assembly as a single unit.

National maintenance manager The CG, AMCAMCU.S. Army Materiel Command is designated as the NMM and as such is responsible for implementing the NMP.

National maintenance program The NMP supports the Army’s strategy to move to a centrally coordinated and controlled, repair-based logistics system. Distribution-based maintenance operations are identified as operator and/or crew maintenance, field maintenance, and sustainment maintenance (formerly known as national mainte- nance). The CG, AMCAMCU.S. Army Materiel Command, as the NMM for the Army, is responsible for sustainment maintenance operations. Sustainment maintenance consists of tactical, installation and depot activities and is characterized by re- pair to a single standard, that is, the national standard, and return to stock. The primary focus is sustain- ment readiness.

National maintenance program repair standard An NMP repair standard is the standard recognized as the single Army sustainment standard for a repa- rable NSNNSNNational Stock Number. It is defined as the highest published standard and as such may be a DMWR, a NMWR, an AMCOM engineering directive, a TM, a commercial manual, or a statement of work. It is the single stand- ard recognized by the item manager as the sustainment repair standard.

National maintenance work requirement A maintenance serviceability standard for field-level reparables designated for repair and return to AWCF stock. It prescribes the statement of work to be performed on an item by organic depot maintenance facili- ties, certified non-depot national providers, or contractors; types and kinds of materiel to be used; and quality of workmanship. The NMWR also addresses repair method, procedures and techniques, modifica- tion requirements, fits and tolerances, equipment performance parameters to be achieved, quality assur- ance discipline, and other essential factors to ensure that an acceptable and cost-effective product is ob- tained.

Nonavailable days The number of hours the equipment was not able to do its mission; the time the equipment is NMC. This term is used on DA FormDA FormDepartment of the Army form 2406 (Maintenance Condition Status Report) to rate equipment's ability to do its combat or combat support job.

Not mission capable A materiel condition indicating that equipment cannot perform any one of its combat missions. NMC time is divided into NMC maintenance or NMC supply.

Not mission capable maintenance Equipment that cannot perform its combat mission because maintenance work is underway or needed.

Not mission capable supply Equipment that cannot perform its combat mission because of maintenance work stoppage due to supply backorders.

Off-site maintenance Maintenance authorized to be performed by designated maintenance facilities not located where the equipment is operated.

Oil analysis A test or series of tests (spectrometric and physical property) that provide an indication of equipment component and oil condition by applying methods of quantitative measurement of wear metals and detec- tion of contaminants in an oil sample.

On condition oil change An oil change directed by the AOAP laboratory as a result of diagnostic test findings relative to the ser- viceability of the oil and its lubricating capability.

Onsite maintenance Maintenance authorized to be performed where the equipment is operated.

Operator and/or crew maintenance Operator and/or crew maintenance is the cornerstone of Army maintenance, the first and most critical op- eration of the Army Maintenance System. It starts with the operator and/or crew performing PMCS using the applicable TM – 10 series. The before- and during-PMCS concentrate on ensuring equipment is FMC. Maintenance operations normally assigned to operator and/or crew include the following: CBM indicators or instrumentation. spot painting), tightening, replacement, and minor adjustments authorized by the MAC. onboard the equipment or system to perform these tasks. MAC and carried on board the equipment or system.

Overhaul Overhaul is maintenance that restores equipment or components to a completely serviceable condition with a measurable (expected) life. This process involves inspection and diagnosis according to the DMWRs, NMWRs, or similar technical directions that identify components exhibiting wear and directs the replacement or adjustment of those items in accordance with the applicable technical specifications.

Pacing items Major weapons or equipment systems of such importance that they are subject to continuous monitoring and management at all levels of command. Pacing items are identified in AR 220 – 1. Pacing items are noted on DA FormDA FormDepartment of the Army form 5990 – E or DA FormDA FormDepartment of the Army form 2407.

Part An item that cannot normally be disassembled or repaired or is of such a design that disassembly or re- pair is impractical (for example, bracket, gear, resistor, or toggle switch).

Partially mission capable Material condition of an aircraft or training device indicating that it can perform at least one but not all of its missions because of maintenance requirements existing on the inoperable subsystem(s). PMC is di- vided into PMC maintenance and PMC supply.

Performance observation. The process by which the operator observes equipment performance against established standards and reports problems that degrade equipment before they become catastrophic. Performance observation is the foundation of the Army maintenance program and is the basis of PMCS that is required by all equip- ment TMs in the before, during, and after operation checks.

Physical property tests Analytical tests of used oil samples to detect oil property changes resulting from changing equipment con- ditions or maintenance practices.

Possible days/hours The number of calendar days/hours an item was on hand on the APSR during the DA FormDA FormDepartment of the Army form 2406 report. For an item received during the reporting period, the first day/hour it was on hand is counted as a possi- ble day. The last day an item was on hand (that is, the day it was lost from the APSR) is not counted as a possible day.

Precombat checks Essential functional and safety checks performed by the operator/crew in accordance with the system's precombat checklist to ensure the system can perform its warfighting mission. Faults that will prevent the performance of the mission must be corrected prior to the start of the mission. All other faults are cor- rected or, if above operator/crew authorization to correct, reported during or after the mission.

Pre-deployment software support Software engineering and development that occurs prior to the weapon systems achieving the Full De- ployment Decision. It is software that has not been certified for release to a fielded unit and is still under- going development.

Pre-deployment training equipment A pool of standard Army and NS – E pre-positioned at select installations to support pre-deployment train- ing that replicates the equipment units require to accomplish its deployed mission. PDTE is low density, high demand, theater specific equipment not available on the installation or determined unavailable for hand receipt or lateral transfer from another unit or installation to support training requirements for 90days or less.

Predictive maintenance Maintenance actions based on the observation of data analysis; trends, models, and/or algorithms to as- sign replacement of (Class IX) components or sub-assemblies in advance of functional failure.

Preliminary source of repair decision The SOR decisions for the system and each subsystem scheduled for depot repair/overhaul as devel- oped by the MATDEV as soon as the system and subsystems are developed enough to conduct an SOR analysis and make analysis-based decisions. This will be the SOR decision used for planning purposes until Milestone C, when the MSC assumes the SOR decision responsibility.

Preventive maintenance All actions performed to retain an item in a specified condition by providing systematic inspection, detec- tion, and prevention of incipient failures.

Preventive maintenance checks and service Preventive maintenance checks and service is the care, servicing, inspection, detection, and correction of minor faults before these faults cause serious damage, failure, or injury. The procedures and the category of maintenance to perform PMCS are found in the TM, LO, and ETM 10- and 20-series.

Prognostic maintenance Maintenance actions related to using condition data to influence mitigation of functional failures of (Class VII) repairable systems/subsystems through replacement or repair of subordinate assemblies or related components.

Prognostics predictive maintenance PPMx is the data and machine learning-driven capability to measure equipment health and performance characteristics to support the commander and life cycle manager’s ability to plan and execute data-in- formed and fleet management readiness decisions. It is achieved through the application and integration of processes, technologies, and knowledge-based capabilities that will allow the Army to achieve and maintain targeted availability, reliability, and cost targets for weapon systems across their life cycle.

Qualification Qualification refers to the NMP process for certifying sources of repair as national maintenance providers. This process has two parts: compliance and technical certification. All sources of repair must be compli- ant. To be compliant, an SOR must demonstrate a documented quality management system. For each component for which the national standard is a DMWR or NMWR, the SOR must pass a technical certifi- cation. The technical certification validates that the SOR possesses the necessary facilities, tools, TMDE, skills, and manpower required for the repair. A technical certification is not required for components re- paired to TM standard (see qualified national provider).

Qualified national provider A qualified national provider is an SOR that possesses a documented quality management system and the necessary facilities, tools, TMDE, skills, and manpower required to repair a specific component(s) to the national standard. Qualified national provider qualification is required before facilities may initiate na- tional maintenance repairs. Exceptions may only be granted by the NMM.

Readiness The capability of a unit and/or formation, ship, weapon system, or equipment to perform the mission or functions for which it is organized or designed.

Rear detachment equipment Nondeploying equipment that is accounted for on the units APSR by rear detachment personnel.

Rebuild Rebuild is maintenance that restores the system to a like-new condition in appearance, performance, and life expectancy. It inserts new technology where practical to improve reliability and maintainability. The rebuild process is a total end item tear down and replacement of all expendable components, all aged components, reconditioning of structural components, and the procedures identified for overhaul of the end item. For rebuild, like-new condition includes technology insertion and results in same model new measurable (expected) life.

Recapitalization Recapitalization is the rebuild and selected upgrade of currently fielded systems to ensure OR and a near zero-time/zero-mile system.

Recapitalization standard Recapitalization standard is near zero time/zero miles. Near zero-time standard means that selected com- ponents within the system will be replaced with new items or items overhauled to NMP repair standards, which is overhaul with a measurable (expected) life. Obsolete parts will be replaced, and selected tech- nology insertions will be made. For recapitalization, near zero time/zero mile includes technology insertion and results in a new model-new life.

Recapitalization through spares Replacement of components as they wear out with recapitalized components.

Regional maintenance center A CE field and/or sustainment maintenance activity with fixed shops and contact teams that are managed by ASC.

Release action An order rescinding a suspension or restriction. It puts materiel back in use or releases it from re- striction(s). See TB 9 – 1300 – 385 for more information.

Reliability-centered maintenance A logical discipline for developing a scheduled-maintenance program that will realize the inherent reliabil- ity levels of complex equipment at minimum cost.

Repair Restoration or replacement of parts and/or units to maintain efficient operating conditions.

Repairable item An item that can be restored to perform all its required functions by corrective maintenance.

Reparable Class IX secondary items that carry an MRC of D, F, H, or L.

Replace Replace is defined as removal of consumable and/or repairable unserviceable item and/or component, and installation of a serviceable item and/or component in its place. Replace is authorized by the MAC and assigned a maintenance level which is shown as the third position of the source, maintenance, and recoverability code (class II, III, V, and IX).

Reset A set of actions to restore equipment to a desired level of combat capability commensurate with a unit’s future mission. Reset reverses the effects of combat stress on equipment.

RESET When viewed in all capital letters, RESET refers to the Army imperative that will systematically restore deployed units to an appropriate level of equipment, Soldier, and Family readiness in preparation for fu- ture deployments and contingencies.

Restriction An order placing special working limits on materiel. The limits are set for safety or because of degraded performance.

Retail inter-service support Support accomplished at the post, installation, and base level and between operating commands with re- sources that are available to the installation commander.

Satellite material maintenance activity A maintenance activity geographically removed from its parent installation. A satellite material mainte- nance activity is authorized equipment maintenance mission to provide economical and timely support maintenance to units and activities whose parent installation cannot meet their needs.

Scheduled preventive maintenance checks and services Checks and services performed by unit maintenance personnel with assistance from the operation and/or crew in accordance with the TM and/or ETM XX – 10 series PMCS tables and lube orders. Some equip- ment also requires scheduled PMCS tasks to be performed by field personnel in accordance with the equipment TM and/or ETM XX – 20 series. All equipment faults are corrected or, if above the unit mainte- nance level authorization (in accordance with MAC) to correct, job ordered to field maintenance. Deferred maintenance is completed during the scheduled service. Upon conclusion of the service, equipment should meet the TM and/or ETM XX – 10 and XX – 20 series maintenance standards.

Selected upgrade Selected upgrade rebuilds the system and adds warfighting capability improvements that address capa- bility shortcomings. The result of a recapitalization selected upgrade is a system with a new model and a new life and improved warfighting capability.

Sensitive source of repair SOR decision made by the MATDEV prior to the data being available for a detailed cost-based analysis. Based on the combat developer’s maintenance concept and other judgment factors. The tentative SOR will be used for early depot workload planning but is subject to change as the system is developed. The tentative SOR decision will be replaced by the preliminary SOR decisions as soon as the data are availa- ble to do an analysis using the decision-tree methodology.

Serious defect (applies to ammunition) Defect resulting from bad design, manufacturing, handling, or storage that may cause malfunctions when ammunition is handled or fired.

Service life surveillance Post-production inspection, test, and analysis activity that verifies the actual condition of items after peri- ods of use or storage.

Shelf-life The total period of time beginning with the manufactured date, cured date (elastomeric and rubber prod- ucts only), assembled date, packed date (subsistence only), or packaging date (SAE AS5502 items only) and terminated by the date which an item must be used (expiration date) or subjected to inspection or test (inspect/test date), restoration, or disposal action. Shelf-life is not to be confused with service life.

Shop replacement unit A component and/or module installed in an end item of equipment, system, or LRU that is replaceable only in a repair facility (shop environment) designated in the applicable MAC.

Shortcoming A fault that requires maintenance or supply action on a piece of equipment but does not render equip- ment NMC.

Single-standard repair A process that seeks to ensure a single repair standard is applied to all end items, secondary items, and components that have been repaired and returned to supply.

Special mission alteration A materiel change, normally of a temporary nature, required for the accomplishment of a special mission.

Special purpose alteration Materiel changes authorized in appropriate TMs to enable the operation and use of equipment for specific climatic or geographic conditions.

Special repair authority The specific approval given to a sustainment maintenance unit or activity, with the authorized special tools, test equipment and capability, to repair DA-designated items of materiel coded D or L in MACs for a period of time not to exceed 1 year.

Spectrometric analysis A method to determine the concentration of various chemical elements in an oil sample by means of spectroscopy, primarily to detect the presence of abnormal amounts of wear metal that may indicate the potential failure of a component.

Sub-shops Sub-elements of AMSAs, CSMSs, ECSs, or organizational maintenance sub-shops established when the density of equipment is sufficient to make such an operation cost effective.

Substitute item An item authorized issue instead of, or in place of, an authorized standard item of like nature and quality. EM 0007 FED LOG identifies items and procedures for making substitutions.

Subsystem A separately authorized item issued or intended to work with other items to form an operational unit/sys- tem.

Support equipment All ancillary and associated equipment (mobile or fixed) required to separate and support a materiel sys- tem. This includes ASIOE such as trucks, air conditioners, generators, ground handling and maintenance equipment, tools metrology, calibration and communications equipment, test equipment, and automatic test equipment with diagnostic software for both on and off equipment maintenance.

Support system Collectively, those tangible logistic support resources required to maintain a materiel system in an opera- tionally ready condition. It is developed with the materiel system and merged with the ongoing logistic systems upon production and development. The following elements of ILS constitute the support system such as support and test equipment, supply support, transportation and handling, technical data, facilities, and trained personnel. The other elements of ILS are how the support system is developed and imple- mented.

Supportability A measure of impacts to the logistical system consisting of such things as an evaluation of reliability, sus- tainment costs, and number of configurations.

Surge The act of expanding an existing depot maintenance repair capability to meet increased requirements by adjusting shifts; adding skilled personnel, equipment, spares, and repair parts to increase the flow of re- paired or manufactured materiel to the using activity; or for serviceable storage.

Suspended munitions Munitions removed from issue, movement, test, and use with or without limitations. These are removed because of a suspected or known unsafe or defective condition. Reference TB 9 – 1300 – 385 for defini- tions and instructions on suspensions, restrictions, and release of ammunition.

Sustainment maintenance Sustainment maintenance is the second operation of the Army Maintenance System. Sustainment maintenance is characterized by the performance of maintenance tasks, “off system” in a secure environ- ment using trained personnel, tools, and TMDE. Sustainment maintenance is typically repair and return to stock and depot-maintenance operations.

Sustainment test support package An assemblage of support elements provided prior to and used during development and OTs to validate the field and sustainment maintenance requirements and capability. The maintenance test support pack- age includes all required draft equipment publications (operator through sustainment maintenance equip- ment manuals); parts accessories; special and common tools; test, support, calibration, and maintenance shop facilities; and personnel skill requirements.

System A combination of equipment end items, assemblies, major components, components, modules, and parts assembled as a single functional unit to perform a task or mission.

System peculiar test, measurement, and diagnostic equipment TMDE dedicated to peculiar test and repair of a single materiel system or item of equipment.

Test program sets The combination of interface devices, software test programs (such as those residing in logic storage me- dia or in permanent digital memory), and documentation (for example, TMs and technical data packages) that together allows the automatic test equipment operator to perform the testing/diagnostic action on the unit under test.

Test, measurement, and diagnostic equipment Any system or device used to evaluate the operational condition of an end item or subsystem thereof to identify and/or isolate any actual or potential malfunction. This TMDE includes diagnostic and prognostic equipment; semiautomatic and automatic test equipment, to include test program sets (with issued software); and calibration test or measurement equipment. When the term TMDE is used, it refers to both general-purpose TMDE and special-purpose TMDE.

Theater provided equipment Permanent theater equipment that has been identified, collected, and positioned forward to offset equip- ment deployment requirements, fill shortages, fill DA approved operational need statements or to fill Mini- mum Essential Equipment Lists.

Unique item identifier The UII is a globally unique and unambiguous identifier that distinguishes an item from all other like and unlike items. The UII is a concatenated value that is derived from a UII data set of one or more data ele- ments. For DoD purposes, a compliant UII is either a Construct 1, Construct 2, global individual asset identifier, serialized global returnable asset identifier, vehicle identification number, or electronic serial number (for cell phones only), all of which have their data elements encoded in a DoD compliant two-di- mensional data matrix.

Unit identification code A six-character code assigned to a specific unit. All units’ organizations and activities use their own UICUICUnit identification code. Contractors, manufacturers, and commercial activities do not have UICs.

Unit maintenance shop Maintenance facility located in conjunction with a USARUSARUnited States Army Reserve center or Armed Forces Reserve Center for unit training and equipment support.

Unit training equipment sites An ARNGARNGArmy National Guard TDATDATables of distribution and allowances maintenance facility, which provides full-time field maintenance support to ARNGARNGArmy National Guard equip- ment assigned to the site.

Unsafe condition An occurrence of hazard severity Category I or II or Military Standard-882. This includes the conditions that cause loss or serious damage to the end item or major components, loss of control, death, serious injury, or illness.

User representative The combat developer designated to represent the user in development and testing of new or improved systems.

Winterization and/or winterized The application or installation of auxiliary kits and/or equipment which may include engine pre-heaters, personnel heater kits and hardtop or insulated closures necessary to pre-heat and start equipment within one hour and maintain a temperature of 41 degrees Fahrenheit in troop compartments when in a temper- ature range of negative 25 degrees Fahrenheit to negative 60 degrees Fahrenheit. Also includes the use of arctic grade lubricants and fluids for engines, transmissions, gear cases and other assemblies, as nec- essary.