MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
a. This section provides a general explanation of all maintenance and repair functions authorized at
various maintenance levels.
b. Section II designates overall responsibility for the performance of maintenance functions on the
identified end item or component and the work measurement time required to perform the functions by
the designated maintenance level. The implementation of the maintenance functions upon the end item
or components will be consistent with the assigned maintenance functions.
c. Section III lists the tools and test equipment required for each maintenance function as referenced
from Section II (Not Applicable).
B-2. EXPLANATION OF COLUMNS IN SECTION II
a. Column (1), Group Number. Column 1 lists group numbers to identify related components,
assemblies, subassemblies, and modules with their next higher assembly. The applicable groups are listed
in the MAC in disassembly sequence beginning with the first group removed.
b. Column (2), Component/Assembly. This column contains the noun names of components, assemblies,
subassemblies and modules for which maintenance is authorized.
c. Column (3), Maintenance Functions. This column lists the functions to be performed on the item
listed in column 2. The maintenance functions are defined as follows:
(1) Inspect. To determine serviceability of an item by comparing its physical, mechanical, or
electrical characteristics with established standards through examination.
(2) Test. TO verify serviceability and to detect incipient failure by measuring the mechanical or
electrical characteristics of an item, and comparing those characteristics with prescribed standards.
(3) Service. Operations required periodically to keep an item in proper operating condition, i.e, to
clean (decontaminate), to preserve, to drain, to paint, or to replenish fuel, lubricants, hydraulic fluids, or
compressed air supplies.
(4) Adjust. To maintain within prescribed Iimits, by bringing into proper or exact position, or by
setting the operating characteristics to psecified parameters.
(5) Align. To adjust specified variable elements of an item to bring about optimum or desired
(6) Calibrate. To determine and cause corrections to be made or to be adjusted on instruments or
test measuring and diagnostic equipments used in precision measurement. Consist of comparison of two
instruments, one of which is a certified standard of known accuracy, to detect and adjust any discrepancy
in the accuracy of the instrument being compared.