MAINTENANCE ALLOCATION CHART
Section 1. INTRODUCTION
1. General
ability standards developed and published by heads
of technical services. This is accomplished through
This appendix contains explanations of all main-
employment of "Inspect and Repair Only as Neces-
tenance and repair functions authorized the various
sary" (IROAN). Maximum utilization of diagnostic
echelons, Section II contains the maintenance
and test equipment is combined with minimum dis-
allocation chart.
assembly of the item during the overhaul process.
2. Maintenance
3. Explanation of Columns
Maintenance is any action taken to keep materiel
a. Functional Group, The functional group is a
in a serviceable condition or to restore it to service-
ability when it is unserviceable. Maintenance of
numerical group set up on a functional basis. The
materiel includes the following:
applicable Functional Grouping Indexes (obtained
a. Service. To clean, preserve, and replenish fuel
from the Corps of Engineers Functional Grouping
Indexes) are listed in the MAC in the appropriate
and lubricants.
b. Adjust. To regulate periodically to prevent
numerical sequence, These indexes are normally
malfunction.
set up in accordance with their function and prox-
c. Inspect. To verify serviceability and detect
imity to each other.
incipient electrical or mechanical failure by scrutiny.
b. Components and Related Operation. This col-
d. Test. To verify serviceability and detect
umn contains the functional grouping index head-
incipient electrical or mechanical failure by use of
ing, subgroup headings, and a brief description of
special equipment such as gages, meters, and the
t h e part, starting with the noun name. It also
like.
designates the operations to be performed, such as
e. Replace. To substitute serviceable assemblies,
service, adjust, inspect, test, replace, repair, and
subassemblies, and parts for unserviceable com-
overhaul.
ponents.
c. Echelons of Maintenance. This column con-
j. Repair. To restore an item to serviceable con-
tains the various echelons of maintenance by number
dition through correction of a specific failure or
designation. An X placed in the appropriate echelon
unserviceable condition. This function includes, but
column in line with an indicated maintenance func-
is not limited to, inspecting, cleaning, preserving,
tion authorizes that echelon to perform the function.
adjusting, replacing, welding, riveting, and straight-
The X indicates the lowest echelon responsible for
ening.
performing the function, but does not necessarily
g. Aline. To adjust two or more components of
indicate repair parts stockage at that level. Higher
an electrical system so that their functions are
echelons are authorized to perform the indicated
properly synchronized.
functions of lower echelons.
h. Calibrate. To determine, check, or rectify the
graduation of an instrument, weapon, or weapons
d. Remarks. This column lists specific mainte-
system, or components of a weapons system.
nance functions, special tools, cross-references, in-
i. Overhaul. To restore an item to completely
structions, and the like pertinent to the operation
serviceable condition as prescribed by service-
being performed.
TAGO 5672-A
