An ASCC organization's functions are to provide maintenance to units in and passing through the COMMZ, to provide backup DSM and GSM support to one or more corps, and to repair and return equipment and materiel to the supply system. ASCC organization principles for maintenance support are¾


· Conserve resources within the scope of mission accomplishment.

· Reduce the maintenance burden on forward elements.

· Concentrate on rapidly returning equipment to the supply system.

· Allocate critical maintenance skills to support requirements that contribute the most to operational availability.

· Provide for channels to obtain support as needed from allied maintenance organizations.




The ASG is assigned on the basis of one or more per TAACOM, depending on the geographic area and number of subordinate units. ASGs provide DSM, GSM, GS supply, and services to tenant units and units passing through their assigned areas. The ASG provides¾


· DSM to supported units on an area basis.

· GSM to the theater supply system.

· GS supply to the corps' units and units passing through or stationed in its geographic area of responsibility and assists in receiving, equipping, and preparing US units arriving in the theater.


The ASG also maintains and issues ASCC war reserves and sustaining stocks. It is within these ASGs that the GSM units are found. (Within an ASG, there may be both DSM and GSM units. These units may be in separate battalions or in the same battalion, depending on the size of the force being supported.) DSM units perform the same functions as DSM units in the corps area. GSM units perform the following missions in support of the theater:


· Repair components for the theater supply system.

· Limited repair of selected end items.

· Backup or reinforcing maintenance support to DS units.

· Provide augmentation teams as required to weight the maintenance battle.




GS-level maintenance supports the theater supply system through repairing components, assemblies, reparable exchange (RX) items, and operational readiness float (ORF) items. Maintenance also includes overhauling end items and maintaining theater reserve stocks. This level of maintenance incorporates TOE, TDA, contractor, Depot System Command, or FNS activities in support of theater supply. GSM facilities are normally at EAC and operate in semifixed or fixed facilities.


GSM companies are structured to allow the theater to tailor them appropriately to support mission requirements. Each company has a base structure that can be augmented with a variety of composite platoons that have separate standard requirement codes (SRCs). This structure allows the company to be tailored to meet mission requirements and enhance deployment requirements to support force-projection operations and other operations. The base company may be augmented by any one of the following modular platoons:


· Track vehicle repair · Quartermaster/chemical equipment repair

· Wheeled vehicle repair · Signals communications equipment repair

· Radar/digital equipment repair · Construction equipment repair

· Armament equipment · COMSEC/intel elect warfare repair

· Power-generation repair · Theater COMSEC record/inventory control


The TAMMC assigns the GS workload through the TAACOM MMC based on the theater's materiel needs. Typically, the TAMMC is the only agency that has theaterwide visibility of supply assets and requirements. It will apportion the GSM workload among the TAACOMs. The TAMMC will normally apportion the GSM workload in one of the following ways:


· GSM workload requirement is given to the TAACOM MMC. In this case, the TAACOM MMC will decide which GS assets within the TAACOM will be tasked.

· GSM workload requirement is given directly to the ASG/GSM unit. An information copy of the tasking document is required if transmitted to the TAACOM MMC.


For either method, the TAACOM MMC monitors the ASG/GSM unit's performance.




At EAC, the ordnance GS missile system support company provides GSM support for air defense and land combat weapon systems (except Patriot and Hawk air defense missile systems) for the entire theater. DS/GS augmentation teams may augment the company to support missile systems that are not habitually found in the theater. The company also operates the missile general supply support base which is a source of missile parts for the theater. At EAC and the corps area, the Patriot DSM company pro-vides DS conventional maintenance support and class IX repair parts supply service to one Patriot air defense artillery battalion. This company is augmented by a DS/GS augmentation team.




Army aviation maintenance operations and organizations are integral to EAC, corps, and division aviation sustainment. The EAC aviation maintenance battalion's purpose is to provide aviation intermediate maintenance (AVIM) and backup aviation unit maintenance (AVUM) support to EAC-assigned aircraft; aviation repair parts supply support to EAC aviation units (including armament and avionics); and selected repair parts RX support for corps AVIM units. The EAC AVIM battalion also

provides backup AVUM to corps and division aviation units in the theater. Normally, two EAC aviation maintenance companies are assigned to an AVIM battalion. Depending on METT-T, the number and employment of AVIM companies will be tailored to best accomplish the mission. The AVIM battalion is organic to the TAACOM ASG.


Army aviation is extremely dependent on contractor maintenance. Civilian contractors exclusively maintain certain technical subsystems (i.e., Apache Longbow millimeter wave radar, Kiowa Warrior mast-mounted sight, etc.). To provide responsive support to a theater or contingency operation, AMC will supplement existing TAACOM AVIM capabilities with additional maintenance and supply support. AMC's ATCOM will often establish specialized repair activities, augment aviation logistic assistance representatives, and contract additional civilian support as part of the aviation maintenance structure. This same tailorable support package is also employed during other operation contingencies.




The basic theater test, measurement, and diagnostic equipment (TMDE) maintenance support structure is designed to provide one-stop TMDE calibration and repair support (C&RS) to combat divisions, corps, and EAC DS and GS units; AVIM units; and field depots. The TMDE battalion directs and coordinates TMDE C&RS for the TAACOM. It also provides a battalion headquarters and head-quarters detachment to command and control TMDE maintenance operations.


A battalion is assigned when three or more companies operate in a theater of operations. Each TAACOM and corps is assigned one company. Each maintenance company has an operations section that plans, programs, supervises, and coordinates the technical operations of the company's TMDE C&RS mission. The operations section consists of five support elements:


a. An AN/GSM286 support team that provides theater-level C&RS for approximately 2,700 items of TMDE.


b. An AN/GSM287 support team that provides twice as many (5,400) items of TMDE as the AN/GSM286 support team because of the increased accuracy in low-frequency and microwave capabil-ities of the AN/GSM287 test set.


c. An Army calibration laboratory team that maintains and operates the secondary reference meas-urement standards to provide C&RS on all standards listed in Technical Bulletin 43-180 as requiring secondary reference level support (S-level).


d. AN/GSM-286 and AN/GSM-287 TMDE support augmentation teams that provide additional TMDE maintenance support specialists (military occupational specialty 35H) to existing area TMDE support teams.




At EAC and the corps area, the collection and classification company establishes and operates a col-lection and classification facility for receiving, inspecting, segregating, preserving, and disposing of serviceable and unserviceable class VII and class IX materiel and similar foreign materiel (except items peculiar to cryptographic materiel, missile systems, airdrop equipment, aircraft, drones, and medical materiel). Basis of allocation is one per TAACOM, and it is normally attached to an ASG maintenance battalion.



The TAMMC is the nerve center for ASCC theater supply and maintenance operations. The TAMMC tracks those supplies the ASCC designates as critical. It also serves as the prime interface between the theater and the CONUS sustaining base. To assist supply transactions, the TAMMC is connected electronically to the TAMCA, the TAACOM MMCs, the COSCOM MMCs, and the CONUS sustaining base. It coordinates assigned tasks, objectives, and priorities to support the theater mission. The TAMMC may also task TAACOM intermediate (GS) maintenance units to provide maintenance as the ASCC directs.


Critical systems that require intensive management may be assigned a theater army logistic system manager (TALSM). The ASCC will provide the TALSM with a charter specifying duties, responsibil-ities, and authority. The TALSM must be able to identify problems readily, establish priorities, and monitor theater requirements. The TALSM also coordinates with the CONUS base; ASCC staff elements; host nations; other service components; allied commands; and MMCs in the DISCOM, corps, and TAACOM.