APPENDIX II
MAINTENANCE ALLOCATION
Section I. INTRODUCTION
1. General
i. Overhaul. To restore an item to completely
serviceable condition as prescribed by serviceability
This appendix contains explanations of all
standard developed and published by heads of technical
maintenance and repair functions authorized the various
services. This is accomplished through employment of
levels of maintenance.
the technique of "Inspect and Repair Only as
maintenance allocation chart.
Necessary" (IROAN). Maximum utilization of diagnostic
and test equipment is combined with minimum
2. Maintenance
disassembly of the item during the overhaul process.
Maintenance is any action taken to keep
3. Explanation of Columns
materiel in a serviceable condition or to restore it to
serviceability when it is unserviceable. Maintenance of
a. Functional Group. The functional group is a
materiel includes the following:
numerical group set up on a functional basis. The
a. Service. To clean, preserve, and replenish fuel
applicable Function Grouping Indexes (obtained from
and lubricants.
the United States Army Mobility Command) are listed on
b. Adjust. To regulate periodically to prevent
the MAC in the appropriate numerical sequences.
malfunction.
These indexes are normally set up in accordance with
their function and proximity to each other.
c. Inspect. To verify serviceability and detect
incipient electrical or mechanical failure by scrutiny.
b. Components and Related Operation.
This
column contains the Functional Grouping Index heading,
d. Test.
To verify serviceability and detect
subgroup headings, and a brief description of the part
incipient electrical or mechanical failure by use of
starting with the noun name. It also designates the
special equipment such as gages, meters, and the like.
operations to be performed such as service, adjust,
e. Replace. To substitute serviceable assemblies,
inspect, test, replace, repair, and overhaul.
subassemblies,
and
parts
for
unserviceable
c. Levels of Maintenance. This column contains
components.
the various levels of maintenance by letter designations:
f. Repair. To restore an item to serviceable
condition through correction of a specific failure or
O/C -------------------------
Operator or Crew
unserviceable condition. This function includes, but is
O ----------------------------
Organizational
not limited to, inspecting, cleaning, preserving,
DS---------------------------
Direct Support
adjusting, replacing, welding, riveting, and straightening.
GS --------------------------
General Support
g. Align. To adjust two or more components of an
D-----------------------------
Depot
electrical system so that their functions are properly
synchronized.
An X placed in the appropriate level of maintenance
h. Calibrate. To determine, check, or rectify the
column in line with and indicated maintenance function
graduation of an instrument, weapon, or weapons
authorizes that level to perform the function. The X
system.
indicates the lowest
AGO 6819A
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