TM 9-4933-223-13&P
APPENDIX B
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
B-1. MAINTENANCE ALLOCATION CHART
and quantity of authorized spare modules/components will be consistent with
the mobility requirements dictated by the air mobility concept. (Assignments
a. This Maintenance Allocation Chart (MAC) assigns maintenance
of maintenance tasks to divisional company size aviation units will consider
functions in accordance with the three levels of maintenance concept for
the overall maintenance capability of the division, the requirement to
Army aviation. These maintenance levels (categories) - Aviation Unit
conserve personnel and equipment resources, and air mobility
Maintenance (AVUM), Aviation Intermediate Maintenance (AVIM), and
requirements.)
Depot Maintenance - are depicted on the MAC as:
(a) Company Size Aviation Units: Perform those tasks which consist
AVUM, which corresponds to an 0 code in the Repair Parts and
primarily of preventive maintenance and maintenance repair and
Special Tools List (RPSTL)
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
AVIM, which corresponds to an F code in the Repair Parts and Special
inspections as authorized by the MAC or higher head-quarters. Identify the
Tools List (RPSTL)
cause of equipment/system mal-functions using applicable technical manual
trouble-shooting instructions, built-in-test equipment (BITE), installed aircraft
DEPOT, which corresponds to a D code in the Repair Parts and
instruments, or test, measurement, and diagnostic equipment (TMDE).
Special Tools List (RPSTL)
Replace worn or damaged modules/components that do not require complex
adjustments or system alinement and which can be removed/installed with
b. The maintenance to be performed below depot and
available skills, tools, and ground support equipment. Perform operational
in the field is described as follows:
and continuity checks and make minor repairs to the electrical system.
Inspect, service and make operational, capacity, and pressure checks to
(1) Aviation Unit Maintenance (AVUM) activities will be staffed and
hydraulic systems. Perform servicing, functional adjustments, and minor
equipped to perform high frequency "On-Aircraft" maintenance tasks
repair/replacement to the flight control, propulsion, power train, and fuel
required to retain or return aircraft systems to a serviceable condition. The
systems. Accomplish air frame
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
B-1
