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Section III. MAINTENANCE AND OPERATING SUPPLIES - TM-10-3930-609-120079
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Section II. MAINTENANCE ALLOCATION CHART - TM-10-3930-609-120082
TM 10-3930-609-12
APPENDIX C
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
The maintenance functions are defined as fol-
C-1. General
lows:
a. This section provides a general explanation
A Inspect: To determine serviceability of an item by
of all maintenance and repair functions au-
comparing its physical, mechanical, and electrical
thorized at various maintenance levels.
an item to bring to optimum performance.
B Test: To verify serviceability and to detect elec-
b. Section II designates overall responsibility
trical or mechanical failure by use of test equip-
for the performance of maintenance functions on
ment
the identified end item or component. The im-
C Service: To clean, to preserve, to charge, to paint,
plementation of the maintenance functions upon
and to add fuel, lubricants, cooling agents, and
the end item or component will be consistent
air.
D Adjust: To rectify to the extent necessary to
with the assigned maintenance functions.
bring into proper operating range.
c. Section III lists the special tools and test
E Aline: To adjust specified variable elements of
equipment required for each maintenance func-
an item to bring to optimum performance.
tion as referenced from Section II.
F Calibrate: To determine the corrections to be
made in the readings of instruments or test equip-
d. Section IV contains supplemental instruc-
ment used in precise measurement. Consists of the
tions, explanatory notes and/or illustrations re-
comparisions of two instruments, one of which is
quired for a particular maintenance function.
a certified standard of known accuracy, to detect
and adjust any discrepancy in the accuracy of the
instrument being compared with the certified
C-2. Explanation of Columns in Section II
standard.
G Install: To set up for use in an operational en-
a. Group Number, Column (1). The function-
vironment such as an emplacement, site, or ve-
al group is a numerical group set up on a
hicle
functional basis. The applicable functional
H Replace: To replace unserviceable items with serv-
grouping indexes (obtained from TB 750-93-1,
iceable assemblies, subassemblies, or parts.
Functional Grouping Codes) are listed on the
I Repair: To restore an item to serviceable condition.
This includes, but is not limited to, inspection,
MAC (Maintenance Allocation Chart) in the ap-
cleaning, preserving, adjusting, replacing, weld-
propriate numerical sequence. These indexes are
ing, riveting, and strengthening.
normally set up in accordance with their function
J Overhaul: To restore an item to a completely serv-
and proximity to each other.
iceable condition as prescribed by maintenance
serviceability standards using the Inspect and Re-
b. Functional Group, Column (2). This col-
pair Only as Necessary (IROAN) technique.
umn contains a brief description of the compo-
K Rebuild: To restore an item to a standard as near-
ly as possible to original or new condition in ap-
nents of each functional group.
pearance, performance, and life expectancy. This
c. Maintenance Functions, Column (3). This
is accomplished through complete disassembly of
the item, inspection of all parts or components,
column lists the various maintenance functions
repair or replacement of worn or unserviceable
(A through K) and indicates the lowest main-
elements (items) using original manufacturing
tenance category authorized to perform these
tolerances and specifications, and subsequent re-
functions. The symbol designations for the vari-
assembly of the item.
ous maintenance categories are as follows:
d. Tools and Equipment, Column (4). This
C
Operator or crew
column is provided for referencing by code the
O
Organizational maintenance
special tools and test equipment, (sec. III), re-
F
Direct support maintenance
quired to perform the maintenance functions
H  General support maintenance
(sec. II).
D
Depot maintenance
C-1

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