TM 1-4920-500-13&P
ARMAMENT AND ELECTRICAL SHOP
MAINTENANCE ALLOCATION CHART (MAC) INTRODUCTION
INTRODUCTION
Aviation Maintenance Allocation Chart
The MAC (immediately following the introduction) designates overall authority and responsibility for the
performance of maintenance functions on the identified 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 Certification and "D" which corresponds to Depot.
The maintenance to be performed below depot and in the field 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 battlefield, and the need for flexibility. 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 configured 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 flights and
return of repaired aircraft, enforces quality standards, responsible for safety. Also, obtains, stores, and issues
Classes II, III, IV, and IX, prescribed 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 flight 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.
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