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 The Maintenance Allocation Chart (MAC) in Section II designates overall responsibility for the
performance of maintenance functions on the identified end item of component. The implemen-
tation of the maintenance functions upon the end item or component will be consistent with the
assigned maintenance functions.
C Section III lists the special tools and test equipment required for each maintenance function as
referenced from Section 11.
D Section IV contains supplemental instructions or explanatory notes for a particular main-
C-2. MAINTENANCE FUNCTIONS
A Inspect. To determine the serviceability of an item by comparing its physical, mechanical and/
or electrical characteristics with established standards through examination.
B Test. To verify serviceability and detect incipient failure by measuring the mechanical or elec-
trical characteristics of an item and comparing those characteristics with prescribed standards.
C 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.
D Adjust. To maintain, within prescribed limits, by bringing into proper or exact position, or by
setting the operating characteristics to specified parameters.
E Replace. The act of substituting a serviceable like type part, subassembly, or module (compo-
nent or assembly) for an unserviceable counterpart.
F Repair. The application of maintenance services (inspect, test, service, adjust, aline, 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, subassembly, module (component or assembly), and item,
G Overhaul. That maintenance effort (service/actions) necessary to restore an item to a com-
pletely serviceable/operational condition as prescribed by maintenance standards (i.e., DMWR)
in appropriate technical publications. Overhaul does not normally return an item to like new
C-3. COLUMN ENTRIES
Columns used in the maintenance allocation chart will be limited to those shown. Entries for those
columns are explained below.
A Column 1, Group Number. Column 1 lists group numbers, the purpose of which is to identify
components, assemblies, subassemblies, and modules with the next higher assembly.
B Column 2, Component/Assembly. Column 2 contains the noun names of components,
assemblies, subassemblies, and modules for which maintenance is authorized.