MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
Test. To verify serviceability and to detect
electrical or mechanical failure by use of test
a. This section provides a general explanation
of all maintenance and repair functions authorized at
Service. To clean, to preserve, to charge, to
various maintenance levels.
paint, and to add fuel, lubricants, cooling agents,
b. Section II designates overall responsibility
for the performance of maintenance functions on the
Adjust. To rectify to the extent necessary to
identified end item or component. The implementation of
bring into proper operating range.
the maintenance functions upon the end item or
Aline. To adjust specified variable elements of
components will be consistent with the assigned
an item to bring to optimum performance.
Calibrate. To determine the corrections to be
c. Section III lists the special tools and test
made in the readings of instruments or test
equipment required for each maintenance function as
equipment used in precise measurement.
Consists of the comparisons of two instruments,
one of which is a certified standard of known
instructions, explanatory notes and/or illustrations
accuracy, to detect and adjust any discrepancy
required for a particular maintenance function.
in the accuracy of the instrument being
compared with the certified standard.
Install. To set up for use in an operational
a. Group Number, Column (1). The functional
environment such as an emplacement, site, or
group is a numerical group set up on a functional basis.
The applicable functional grouping indexes are listed on
Replace. To replace unserviceable items with
the MAC (Maintenance Allocation Chart) in the
serviceable assemblies, subassemblies, or
appropriate numerical sequence. These indexes are
normally set up in accordance with their function and
Repair. To restore an item to serviceable
proximity to each other.
condition. This includes, but is not limited to,
b. Functional Group, Column (2). This column
inspection, cleaning, preserving, adjusting,
contains a brief description of the components of each
replacing, welding, riveting, and strengthening.
Overhaul. To restore an item to a completely
c. Maintenance Functions, Column (3). This
serviceable condition as prescribed by
column lists the various maintenance functions (A
maintenance serviceability standards, using the
through K) and indicates the lowest maintenance level
Inspect and Repair Only as Necessary (IROAN)
authorized to perform these functions. The symbol
designations for the various maintenance levels are as
Rebuild. To restore an item to a standard as
nearly as possible to original or new condition in
appearance, performance, and life expectancy.
C-Operator or crew
This is accomplished through complete
disassembly of the item, Inspection of all parts
F-Direct support maintenance
H-General support maintenance
The maintenance functions are defined as follows:
Inspect. To determine serviceability of an item
by comparing its physical, mechanical, and