Appendix B. MAINTENANCE ALLOCATION CHART

TM 55-1730-227-13&P

MAINTENANCE ALLOCATION CHART

SECTION I. INTRODUCTION

B-1.

General.

a. This section provides a general explanation of all maintenance and repair

functions authorized at various maintenance categories.

b. The Maintenance Allocation Chart (MAC) in Section II designates overall au-

thority and responsibility for the performance of maintenance functions on the

identified end item or component. The application of the maintenance function to

the end item or component will be consistent with the capacities and capabilities of

the designated maintenance categories.

Section III lists the tools and test equipment required for each maintenance

function as referenced from Section II.

d. Section IV contains supplemental instructions and explanatory notes for a

particular maintenance function.

Maintenance functions. Maintenance functions will be limited to and defined

as follows:

a . Inspect. To determine the serviceability of an item by comparing its physical

and mechanical characteristics with established standards through examination (e.g.,

by sight, sound, or feel).

b . Service. Operations required periodically to keep an item in proper operating

condition i.e., to clean, to preserve, to paint, or to replenish lubricants or gases.

c . Replace. To remove an unserviceable item and install a serviceable counter-

part in its place. "Replace" is authorized by the MAC and is shown as the 3d

position code of the SMR code.

d . Repair. The application of maintenance services, including fault location/

troubleshooting, removal/installation, and disassembly/assembly procedures, and

maintenance actions to identify troubles and restore serviceability to an item by cor-

recting specific damage, fault, malfunction, or failure in a part, subassembly, or

end item.

B-3.

Explanation of Columns in the MAC, Section II.

a. Column 1, Group Number. Column 1 lists functional group code numbers, the

purpose of which is to identify maintenance of significant components, assemblies,

and subassemblies, with the next higher assembly. End item group number is "00".

b. Column 2, Component/Assembly. Column 2 contains the names of components,

assemblies, and subassemblies for which maintenance is authorized.

c. Column 3, Maintenance Function. Column 3 lists functions to be performed on the item listed

in Column 2. (For detailed explanation of these functions, see paragraph B-2.) The higher level of

maintenance has the authority to determine: