Section I. INTRODUCTION
MAINTENANCE ALLOCATION CHART
This Maintenance Allocation Chart (MAC) assigns maintenance functions in accordance with the Three Levels
of Maintenance concept for Army aviation. These maintenance levels (categories) - Aviation Unit Maintenance (AVUM),
Aviation Intermediate Maintenance (AVIM), and Depot Maintenance - are depicted on the MAC as:
AVUM, which corresponds to a 0 Code in the Repair Parts and Special Tools List (RPSTL).
AVIM, which corresponds to a F code in the Repair Parts and Special Tools List (RPSTL).
DEPOT, which corresponds to a D code in the Repair Parts and Special Tools List (RPSTL).
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 perform high frequency " n-
Aircraft" maintenance tasks required to retain or return aircraft systems to a 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 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 maintenance capability of the division, the requirement to conserve personnel and
equipment resources, and air mobility requirements.)