TM 5-4310-335-14
APPENDIX B
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 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
component 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, sub-assemblies, 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, sub-assemblies 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, and/or
electrical characteristics with established standards through examination.
(2) Test. To verify serviceability and 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
(decontaminated), to preserve, to drain, to paint, or to replenish fuel, lubricants, hydraulic fluids, or compressed
air supplies.
(4) Adjust. To maintain within prescribed limits, by bringing into proper or exact position, or by setting
the operating characteristics to specified parameters.
(5) Align. To adjust specified variable elements of an item to bring about optimum or desired
performance.
(6) Calibrate. To determine and cause corrections to be made or to be adjusted on instruments or test
measuring and diagnostic equipment used in precision measurement. Consists 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.
(7) Install. The act of emplacing, seating or fixing into position an item, part or module (component or
assembly) in a manner to allow the proper functioning of an equipment or system.
(8) Replace. The act of substituting a serviceable like type part, subassembly, or module (component or
assembly) for an unserviceable counterpart.
(9) Repair. The application of maintenance services (inspect, test, service, adjust, align, calibrate, or
replace) or other maintenance actions (welding, grinding, riveting, straightening, facing, remachining or
resurfacing) to restore serviceability to an item by correcting specific damage, fault, malfunction, or failure in a
part, sub-assembly, module (component or assembly), end item, or system.
(10) Overhaul. That maintenance effort (service/action) necessary to restore an item to a completely
serviceable/operational condition as prescribed by maintenance standards (i.e., DMWR) in appropriate
technical publications. Overhaul is normally the highest degree of maintenance performed by the Army.
Overhaul does not normally return an item to like new condition.
B-1
