APPENDIX II
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
1. General
i. Overhaul. To restore an item to completely
serviceable condition as prescribed by published
This appendix contains explanations of all
serviceability standards. This is accomplished through
maintenance and repair functions authorized the various
employment of the technique of "Inspect and Repair
echelons.
Section II contains the maintenance
Only as Necessary" (IROAN). Maximum utilization of
allocation chart.
diagnostic and test equipment is combined with
minimum disassembly of the item during the overhaul
2. Maintenance
process.
Maintenance is any action taken to keep materiel in
3. Explanation of Columns
a serviceable condition or to restore it to serviceability
when it is unserviceable. Maintenance of materiel
a. Functional Group. The functional group is a
includes the following:
numerical group set up on a functional basis. The
applicable functional grouping indexes (obtained from
the Corps of Engineers functional grouping indexes) are
a. Service. To clean, preserve, and replenish fuel
listed on the MAC in the appropriate numerical
and lubricants.
sequence. These indexes are normally set up in
b. Adjust. To regulate periodically to prevent
accordance with their function and proximity to each
malfunction.
other.
c. Inspect. To verify serviceability and detect
b. Components and Related Operation.
This
incipient electrical or mechanical failure by scrutiny.
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,
inspect, test, replace, repair, and overhaul.
e. Replace. To substitute serviceable assemblies,
c. Echelons of Maintenance. This column contains
subassemblies,
and
parts
for
unserviceable
the various echelons of maintenance by number
components.
designation. An X placed in the appropriate echelon
f. Repair. To restore an item to serviceable
column in line with an indicated maintenance function
condition through correction of a specific failure or
authorizes that echelon to perform the function. The X
unserviceable condition. This function includes, but is
indicates the lowest echelon responsible for performing
not limited to, inspecting, cleaning, preserving,
the function, but does not necessarily indicate repair
adjusting, replacing, welding, riveting, and straightening.
parts stockage at that level. Higher echelons are
authorized to perform the indicated functions of lower
g. Aline. To adjust two or more components of an
echelons.
electrical system so that their functions are properly
d. Remarks.
This column lists specific
synchronized.
maintenance functions, special tools, cross-references,
h. Calibrate. To determine, check, or rectify the
instructions, and the like pertinent to the operation being
graduation of an instrument, weapon, or weapons
performed.
system, or components of a weapons system.
AGO 5078A
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