TM 1-4920-924-13&P
FIELD MAINTENANCE
AVIATION SHOP EQUIPMENT CONTACT MAINTENANCE (AV SECM) SYSTEM
MAINTENANCE ALLOCATION CHART (MAC) INTRODUCTION
Aviation Maintenance Allocation Chart
The MAC (immediately following the introduction) designates overall authority and responsibility for the
performance of maintenance functions on the identiied end item or component. The application of the maintenance
functions to the end item or component shall be consistent with the capacities and capabilities of the designated
maintenance level which are shown on the MAC as:
Field - includes two columns, "O" which corresponds to Aviation Maintenance Company (AMC) and "F" which
corresponds to Aviation Support Battalion (ASB)
Sustainment - includes two columns, "L" which corresponds to Theater Aviation Sustainment Maintenance
Group (TASMG) and other organizations that have National Maintenance Program certiication and "D" which
corresponds to Depot .
The maintenance to be performed below depot and in the ield is described as follows:
1. Aviation Maintenance Company (AMC)
The primary purpose of the aviation maintenance company is to support the momentum of offensive operations.
Composition of the AMC will be based on type of operations being supported, nature of the battleield, and the
need for lexibility. AMCs will provide forward positioning of essential maintenance repair parts and supplies,
maximum use of support teams, use of airlift/air drops for resupply, for maintenance that does not interfere with
the tactical plans and operations. AMCs are agile, mobile, and well equipped. They will carry limited stockpiles
of demand supported, essential parts and supplies. The AMC performs battle damage assessment and repair
(BDAR) and unit level repairs on Aviation Life Support Systems (ALSS). The AMC performs production control,
quality control, and Maintenance Management/Maintenance Test Pilot functions. AMCs will rig aircraft for recovery
operations. The AMC manages the battalion maintenance program and operates a central tool room. The AMC
conducts forward arming and refueling. AMCs will be comprised of 3 to 4 modular platoons, which are conigured
to maintain unit level operational readiness and aircraft availability:
Headquarters Platoon - Establishes standard operating procedures, receives and processes work requests,
schedules maintenance, maintains status of aircraft, coordinates inspections and test lights and return of
repaired aircraft, enforces quality standards, responsible for safety. Also, obtains, stores, and issues Classes II,
III, IV, and IX, prescribe load list, shop stock and authorized stockage list items.
Airframe Repair Platoon - Tailored to battalion it supports. Performs scheduled and unscheduled maintenance,
troubleshoots faulty components, and removes and replaces aircraft components. Provides mission capable
aircraft to support light company operations.
Component Repair Platoon - Performs scheduled and unscheduled maintenance, troubleshoots faulty
components, and removes and replaces aircraft components. Performs BDAR and manages Class IX
spare/shop stock. This platoon uses Shop Equipment Contact Maintenance (SECM) trucks which are
multi-capable and self-contained and are used to perform on-site maintenance using enhanced power tools,
test, measurement, and diagnostic equipment, welding and cutting equipment, and an air compressor. The
SECM truck is highly mobile.
Armament platoon - Only used in attack battalions and cavalry squadrons. Performs scheduled and
unscheduled maintenance on armament components.
2. Aviation Support Company (ASC) In The Aviation Support Battalion (ASB)
Comprised of Headquarters, Airframe, and Component Repair Platoons. Provides maintenance assistance
to aviation units helping them maintain operational readiness and aircraft availability. Utilizes SECM trucks.
Capable of supporting split based operations in two separate and distinct locations. Performs the following
types of maintenance:
1. Intermediate maintenance and logistics support operations.
2. Maintenance actions which require more than 3 days to correct.
3. Phased maintenance and preventive maintenance services.
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