TM 1-8415-216-12&P
APPENDIX B
MAINTENANCE ALLOCATION CHART
SECTION I. INTRODUCTION
B-1. MAINTENANCE ALLOCATION CHART.
a. This Maintenance Allocation Chart (MAC) assigns maintenance functions in accord-
ance with the Three Levels of Maintenance concept for Army Aviation. These mainte-
nance levels (categories) - Aviation Unit Maintenance (AVUM), Aviation Intermediate
Maintenance (AVIM), and Depot Maintenance - are depicted on the MAC as:
l AVUM, which corresponds to an O code in the Repair Parts and Special Tools
List (RPSTL).
l
AVIM, which corresponds to an F code in the Repair Parts and Special Tools
List (RPSTL).
l
DEPOT, which corresponds to a D code in the Repair Parts and Special Tools
List (RPSTL).
b. The maintenance to be performed below depot and in the field is described as follows:
(1) Aviation Unit Maintenance (AVUM) activities will be staffed and equipped to per-
form high frequency “On-Aircraft” maintenance tasks required to retain or return
aircraft systems to serviceable condition. The maintenance capability 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 re-
quired, 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 maintenance capability of the division, the requirement to conserve per-
sonnel and equipment 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 operational readiness. Perform
maintenance inspections and servicing to include preflight, daily, intermedi-
ate, 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), installed aircraft instruments, or test, measurement and di-
agnostic equipment (TMDE). Replace worn or damaged modules/components
that do not require complex adjustment or system alignment and which can
be removed/installed with available skills, tools, and ground support equip-
ment. Perform operational and continuity checks and make minor repairs to
the electrical system. Evacuate unserviceable modules/components and end
items beyond the repair capability of AVUM to the supporting AVIM.
B-1
