TM 5-6115-365-15
APPENDIX C
MAINTENANCE
Section I. INTRODUCTION
C-1. General
a.
This section provides a general explanation of
all maintenance and repair functions authorized at
various maintenance levels.
b.
Section II designates overall responsibility for
the performance of maintenance functions on the
identified item or component. The implementation of the
maintenance functions upon the end item or component
will be consistent with the assigned maintenance
functions.
c.
Section III contains supplemental instructions,
explanatory notes and/or illustrations required for a
particular maintenance function.
C-2. Explanation of Columns in Section II
a.
Group Number. The functional group is a
numerical group set up on a functional basis. The
applicable functional grouping indexes are listed on the
MAC in the appropriate numerical sequence.
b.
Functional Group. This column contains a brief
description of the components of each functional group.
c.
Maintenance Functions. This column lists the
various maintenance functions (A through K) and
indicates the lowest maintenance level authorized to
perform these functions. The symbol designations for
the various maintenance levels are as follows:
C - Operator or crew
O - Organizational maintenance
F - Direct support maintenance
H - General support maintenance
D - Depot maintenance
The maintenance functions are defined as follows:
A - INSPECT. To determine serviceability of an
item by comparing its physical, mechanical, and
electrical characteristics with established standards.
B - TEST. To verify serviceability and to detect
electrical or mechanical failure by use of test equipment.
C - SERVICE. To clean, to preserve, to charge, to
paint, and to add fuel, lubricants, cooling agents, and air.
D - ADJUST. To rectify to the extent necessary to
bring into proper operating range.
E - ALIGN. To adjust specified variable elements
of an item to bring to optimum performance.
F - CALIBRATE. To determine the corrections to
be made in the readings of instruments or test
equipment used in precise measurement. Consists of
the comparisons of two instruments, one of which is a
certified standard of known accuracy, to detect and
adjust any discrepancy in the accuracy, of the instrument
being compared with the certified standard.
G - INSTALL. To set up for use in an operational
environment such as an emplacement, site, or vehicle.
H - REPLACE. To replace unserviceable items
with serviceable assemblies, subassemblies, or parts.
I - REPAIR. To restore an item to serviceable
condition. This includes, but is not limited to, inspection,
cleaning, preserving, adjusting, replacing, welding,
riveting, and strengthening.
J - OVERHAUL. To restore an item to a
completely serviceable condition as prescribed by
maintenance serviceability standards using the Inspect
and Repair Only as Necessary (IROAN) technique.
K - REBUILD. To restore an item to a standard as
nearly as possible to original or new condition in
appearance, performance, and life expectancy. This is
accomplished through complete disassembly of the item,
inspection of all parts or components, repair or
replacement of worn or unserviceable elements (items)
using original manufacturing tolerances and
C-1
