TM 55-2835-209-23
APPENDIX B
MAINTENANCE ALLOCATION CHART
Section I INTRODUCTION
B-1
MAINTENANCE ALLOCATION CHART
a.
This Maintenance Allocation Chart (MAC) assigns maintenance functions in
accordance with the Three Levels of Maintenance concept for Army aviation.
These
maintenance levels (categories) - Avi
mediate Maintenance (AVIM) and Depot
AVUM, which corresponds to
List (RPSTL)
AVIM, which corresponds to
List (RPSTL)
ation Unit Maintenance (AVUM), Aviation Inter-
Maintenance - are depicted on the MAC as:
an O Code in the Repair Parts and Special Tools
an F Code in the Repair Parts and Special Tools
DEPOT, which corresponds to a D Code in the Repair Parts and
List (RPSTL)
b.
The maintenance to be performed below depot and in the field
as follows:
Special Tools
is described
(1) Aviation Unit Maintenance (AVUM) activities will be staffed and
equipped to perform high frequency "On-Aircraft" maintenance tasks required to re-
tain or return aircraft systems to a serviceable condition.
The maintenance capa-
bility of the AVUM will be governed by the Maintenance Allocation Chart (MAC) and
limited by the amount and complexity of ground support equipment (GSE), facilities
required, authorized manning strength and critical skills available.
The range and
quantity of authorized spare modules/components will be consistent with the mobility
requirements dictated by the air mobility concept.
(Assignments of maintenance
tasks to divisional company size aviation units will consider the overall mainte-
nance capability of the division, the requirement to conserve personnel and equip-
ment resources and air mobility requirements.)
(a) Company Size Aviation Units:
Perform those tasks which consist
primarily of preventive maintenance and maintenance repair and replacement functions
associated with sustaining a high level of aircraft operational readiness.
Perform
maintenance inspections and servicing to include preflight, daily, intermediate,
periodic (or phased) and special inspections as authorized by the MAC or higher
headquarters.
Identify the cause of equipment/system malfunctions using applicable
technical manual troubleshooting instructions, built-in test equipment (BITE), in-
stalled aircraft instruments, or test, measurement and diagnostic equipment (TMDE).
Replace worn or damaged modules/ components that do not require complex adjustments
or system alignment and which can be removed/installed with available skills, tools
and ground support equipment.
Perform operational and continuity checks and make
minor repairs to the electrical system.
Inspect, service and make operational, ca-
pacity and pressure checks to hydraulic systems.
Perform servicing functional ad-
justments and minor repair/replacement. to-the flight
train and fuel systems.
Accomplish air frame repair
control, propulsion, power
that does not require extensive
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