TM 55-4920-431-13
have less than ten aircraft assigned. Maintenance tasks performed by the aircraft crew
chief or assigned aircraft repairman will normally be limited to preventive maintenance,
inspections, servicing, spot painting, stop drilling, 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). AVIM provides mobile, responsive
"One Stop" maintenance support (Maintenance functions which are not conducive to sustain-
ing air mobility will be assigned to depot maintenance). Performs 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 replace-
ment and repair of modules/components and end items which can be accomplished efficiently
with available skills, tools, and equipment. 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. Inspects, troubleshoots, tests, diagnoses, repairs,
adjusts, calibrates, and aligns system modules/components. Module/component disassem-
bly 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. Unservice-
able reparable modules/components and end items which are beyond the capability of AVIM
to repair will be evacuated to Depot Maintenance. This level will perform special inspec-
tions which exceed AVUM capability. Provides quick response maintenance support, on-
the-job training, and technical assistance through the use of mobile maintenance contact
teams. Maintains authorized operational readiness float. Provides collections and classi-
fication services for serviceable/unserviceable material. Operates a cannibalization
activity in accordance with AR 750-50. (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 inter-
mediate maintenance support will be provided by the supporting non-divisional AVIM unit).
A-2. Use of the Maintenance Allocation Chart.
a. The MAC assigns maintenance functions to the lowest level of maintenance based on
past experience and the-following consideration:
Skills available.
1.
2.
Time required.
3.
Tools and test equipment required and/or available.
b. Only the lowest level of maintenance authorized to perform a maintenance function
is indicated. If the lowest level of maintenance 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.
c. A maintenance function assigned to a maintenance level will automatically be
authorized to be performed at any higher maintenance level.
d. A maintenance function that cannot be performed at the assigned level of mainte-
nance for any reason may be evacuated to the next higher maintenance organization. Higher
maintenance levels will perform the maintenance functions of lower maintenance levels
when required or directed by the appropriate commander.
A-2
