TM 1-4220-250-12&P
accomplished by the aircraft crew chief or assigned aircraft repairman and will normally be limited to
preventive maintenance, inspections, servicing, spot painting, stop drilling, application of non stress patches,
minor adjustments, module/component fault diagnosis, and replacement of selected modules/components.
Repair functions will normally be accomplished by the supporting AVIM unit
(2)
AVIM provides mobile, responsive "One-Stop" maintenance support. (Maintenance functions which are not
conducive to sustaining air mobility will be assigned to depot maintenance.) AVIM may perform all maintenance
functions authorized to be done at AVUM. Repair of equipment for return to user will emphasize support or
operational readiness requirements. Authorized maintenance includes replacement and repair of
modules/components and end items, which can be accomplished efficiently with available skills, tools, and
equipment. AVIM establishes the Direct Exchange (DX) program for AVUM units by repairing selected items for
return to stock when such repairs cannot be accomplished at the AVUM level. The AVIM level inspects,
troubleshoots, performs diagnostic tests, repairs, adjusts, calibrates, and aligns aircraft system
modules/components. AVIM units will have the capability to determine the serviceability of specified
modules/components removed prior to the expiration of the Time Between Overhaul (TBO) or finite life.
Module/component disassembly and repair will support the DX program and will normally be limited to tasks
requiring cleaning and the replacement of seals, fittings, and items of common hardware. Airframe repair and
fabrication of parts will be limited to those maintenance tasks which can be performed with available tools and test
equipment. Unserviceable reparable modules/components and end items which are beyond the capability of AVIM
to repair will be evacuated to Depot Maintenance. AVIM will perform aircraft weight and balance inspections and
other special inspections which exceed AVUM capability. AVIM provides quick response maintenance support,
including aircraft recovery and air evacuation, on-the-job training, and technical assistance through the use of
mobile maintenance contact teams. The AVIM also maintains authorized operational readiness float aircraft AVIM
shall provide collection and classification services for service able unserviceable materiel. (The aircraft
maintenance company within the maintenance battalion of a division will perform AVIM functions consistent with air
mobility requirements and conservation of personnel and equipment resources. Additional intermediate
maintenance support will be provided by the supporting non divisional AVIM unit.)
NOTE
Nomenclatures used throughout the MAC are approved item names. Those
terms/nomenclatures expressed in parentheses are generic in nature and are not to be
considered as official terminology.
B.2 USE OF THE MAINTENANCE ALLOCATION CHART (SECTION II).
a.
The MAC assigns maintenance functions to the lowest category of maintenance based on past experience and
the following considerations:
(1) Skills available.
(2) Work time required.
(3) Tools and test equipment required and/or available.
b.
Only the lowest category of maintenance authorized to perform a maintenance function is indicated. If the lowest
maintenance category cannot perform all tasks of any single maintenance function (e.g., test, repair), then the
higher maintenance level(s) that can accomplish additional tasks will also be indicated.
B-2
