MAINTENANCE ALLOCATION CHART
Section . INTRODUCTION
B-- Test: To verify serviceability and to detect
electrical or mechanical failure by use of test
a. This section provides a general explanation
C-- Service: To clean, to preserve, to charge, to
of all maintenance and repair functions author- ized at
various maintenance levels.
agents, and air.
b. Section II designates overall responsibility
D-- Adjust: To rectify to the extent necessary to
for the performance of maintenance functions on the
bring into proper operating range.
identified end item or component The implementation of
E-- Aline: To adjust specified variable elements
the maintenance functions upon the end item or
of an item to bring to optimum performance.
component will be consistent with the assigned
F-- Calibrate: To determine the corrections to be
made in the readings of instruments or test
c. Section III not applicable.
equipment used in precise measurement.
Consists of the comparisons of two
instructions, explanatory notes and/or illustrations
instruments, one of which is a certified
required for a particular maintenance function.
standard of known accuracy to detect and
adjust any discrepancy in the accuracy of the
instrument being compared with the certified
a Group Number, Column (1). The functional
G-- Install: To act up for use in an operational
group is a numerical group set up on a functional basis.
environment such as an emplacement, item,
The applicable functional grouping indexes (obtained
from TB 750-93-1, Functional Grouping Codes) are listed
H-- Replace: To replace unserviceable items
on the MAC in the appropriate numerical sequence.
with serviceable assemblies, subassemblies,
These indexes are normally set up in accordance with
their function and proximity to each other.
I-- Repair: To restore an item t serviceable
Functional Group, Column (2). This column
condition. This includes, but is not limited to,
contains a brief description of the components of each
inspection, cleaning, preserving, adjusting,
c Maintenance Functions, Column (3). This
column lists the various maintenance functions (A
J-- Overhaul: To restore an item to a completely
through K) and indicates the lowest maintenance
serviceable condition as prescribed by
category authorized to perform these functions. The
maintenance serviceability standards using
symbol designations for the various maintenance
the Inspect and Repair Only as Necessary
categories are as follows:
K-- Rebuild: To restore an item to a standard as
C--Operator or crew
nearly as possible to original or new
condition in appearance, performance, and
F--Direct support maintenance
This is accomplished
H--General support maintenance
through compete disassembly of the item,
inspection of all parts or components, repair
or replacement of worn or unserviceable
The maintenance functions are defined as follows:
A-- Inspect: To determine serviceability of an
item by comparing its physical, mechanical,