TM 55-2840-254-23
(b) Less than Company Size Aviation Units: Aviation elements organic to brigade, group,
battalion headquarters, and detachment size units are normally small and have less than ten aircraft as-
signed. Maintenance tasks performed by these units will be those which can be accomplished by the air-
craft crew chief or assigned aircraft repairman and will normally be limited to preventive maintenance,
inspections, servicing, spot painting, stop drilling, application of nonstress 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) Aviation Intermediate Maintenance (AVIM) provides mobile, responsive "One-Stop" mainte-
nance 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 re-
pairs 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 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 re-
placement 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 equip-
ment. Unserviceable repairable 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. Provides quick response mainte-
nance support, including aircraft recovery and air evacuation, on-the-job training, and technical assistance
through the use of mobile maintenance contact teams. Maintains authorized operational readiness float
aircraft. Provides collection and classification services for serviceable/unserviceable material. Operates a
cannibalization activity in accordance with AR 750-1. (The aircraft maintenance company within the
maintenance battalion of a division will perform AVIM functions consistent with air mobility require-
ments and conservation of personnel and equipment resources. Additional intermediate maintenance
support will be provided by the supporting nondivisional AVIM unit.)
B-2 USE OF THE MAINTENANCE ALLOCATION CHART (SECTION II)
NOTE
Nomenclatures used throughout the MAC are approved item names. Those terms/nomencla-
tures expressed in parentheses are generic in nature and are not to be considered as official
terminology.
a. The Maintenance Allocation Chart assigns maintenance functions based on past experience and the
following consideration:
(1) Skills available.
(2) Work time required.
(3) Tools and test equipment required and/or available.
B-2
