Change 1 B-1
MAINTENANCE ALLOCATION CHART
SECTION I. INTRODUCTION
This appendix is divided into four sections as follows:
a. Section I. This section provides a general explanation of all maintenance and repair functions authorized at
various maintenance categories.
b. Section II. The Maintenance Allocation Chart (MAC) in Section II designates overall authority and responsibility
for performance of maintenance functions on the identified end item or component. The application of the maintenance
functions to the end item or component will be consistent with the capacities and capabilities of the designated
c. Section III. This section lists the tools (common and special) and test equipment required for each maintenance
function as referenced from Section II.
d. Section IV. This section contains supplemental instructions and explanatory notes for a particular maintenance
B-2. MAINTENANCE FUNCTIONS
Maintenance functions are limited to and defined as the following:
a. Inspect. To determine the serviceability of an item by comparing its physical, mechanical and/or electrical
characteristics with established standards through visual examination.
b. 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.
c. Service. Operations required periodically to keep an item in proper operation condition, to clean, preserve,
drain, 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 operating
characteristics to the 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
or diagnostic equipment used in precision measurement. Consists of the 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
g. Remove/install. To remove and install the same item when required to perform service or other maintenance
functions. Install may be the act of emplacement, sealing or fixing into position a spare, repair part or module
(component or assembly) in a manner to allow the proper functioning of an equipment or system.
h. Replace. To remove an unserviceable item and install a serviceable counterpart in its place. "Replace" is
authorized by the MAC and the assigned maintenance level is shown in the 3rd position of the SMR code.