A P P E N D I X B
M A I N T E N A N C E A L L O C A T I O N C H A R T
SECTION I. INTRODUCTION
a. This section provides a general explanation of all maintenance and repair functions authorized at various
b. The Maintenance Allocation Chart (MAC) in Section II designates overall responsibility for the
performance of maintenance functions on the identified end item or component. The implementation of the
maintenance functions upon the end item or component will be consistent with the assigned maintenance
c. Section III lists the special tools and test equipment required for each maintenance function as referenced
from Section II (Not Applicable).
d. Section IV contains supplemental instructions and explanatory notes for a particular maintenance function
B-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 electrical
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
d. Adjust. To maintain, within prescribed limits, by bringing into proper or exact position, or by setting the
operating characteristics to specified parameters.
e. Align. To adjust specified variable elements of an item to bring about optimum or desired performance.
f. 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. Consists of comparisons 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.
g. 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.
h. Replace. The act of substituting a serviceable like type part, subassembly, or module (component or
assembly) for an unserviceable counterpart.
i. Repair. The application of maintenance services (inspect, test, 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, subassembly,
module (component or assembly), end item, or system.
j. 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