TM-9-1040-267-20-P
LAUNCHER, GRENADE, SMOKE: SCREENING, RP, M243; RP, M257; RP, M259
TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)
FEBRUARY 1984
TM-9-1040-267-20-P - Page 71 of 108
APPENDIX B
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
B1. GENERAL.
a. This section provides a general explanation of all maintenance and repair
functions authorized at various maintenance categories.
b. The Maintenance Allocation Chart (MAC) in section II designates overall
authority and responsibility for the performance of maintenance functions on the
identified end item or component. The application of the maintenance functions
to the end item or component will be consistent with the capacities and
capabilities of the designated maintenance categories.
c. Section Ill lists the tools and test equipment (both special tools and
common tool sets) required for each maintenance function as referenced from
section Il.
d. Section IV contains supplemental instructions and explanatory notes for
a particular maintenance function.
B-2. MAINTENANCE FUNCTIONS.
Maintenance functions will be limited to
and defined as follows: (except for ammunition MAC’).
a. inspect. To determine the serviceability of an item by comparing its
physical, mechanical, and/or electrical characteristics with established stand-
ards through examination (e.g., by sight, sound, or feel).
b. Test. To verify serviceability by measuring the mechanical, pneumatic,
hydraulic, or electrical characteristics of an item and comparing those charac-
teristics with prescribed standards.
c. Service. Operations required periodically to keep an item in proper
operating condition, i.e., to clean (includes decontaminate, when required), to
preserve, to drain, to paint, or to replenish fuel, lubricants, chemical fluids, or
gases.
d.
Adjust.
To maintain or regulate, within prescribed limits, by bringing into
proper or exact position, or by setting the operating characteristics to specified
parameters.
e.
Aline.
To adjust specified variable elements of an item to bring about
optimum or desired performance.
f.
Calibrate.
To determine and cause corrections to be made or to be
adjusted on instruments or test, measuring and diagnostic equipments used in
precision measurements. Consists of 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.
g.
Remove/Install.
To remove and install the same item when required to
perform service or other maintenance functions. Install may be the act of
emplacing, seating, or fixing into position a spare, repair part, or module (com-
ponent or assembly) in a manner to allow the proper functioning of an equipment
or system.
h.
Replace.
To remove an unserviceable item and install a serviceable
counterpart in its place. “Replace” is authorized by the MAC and is shown as the
3d position code of the SMR code.
i.
Repair.
The application of maintenance services
2
, including fault
location/troubleshooting
3
; removal/installation, and disassembly/assembly
4
procedures and maintenance actions
s
to identify troubles and restore servicea-
bility to an item by correcting specific damage, fault, malfunction, or failure in a
part, subassembly, module (component of assembly), end item, or system.
1
Exception is authorized for ammunition MAC to permit the redesignation/redefinition of maintenance function headings to more adequately identify
ammunition maintenance functions. The heading designations and definitions will be included in the appropriate technical manual for each category of
ammunition.
2
Services - inspect, test, service, adjust, aline, calibrate, and/or replace.
3
Fault locate/troubleshoot - The process of investigating and detecting the cause of equipment malfunctioning; the act of isolating a fault within a
system or unit under test (UUT).
4
Disassemble/assemble - encompasses the Step-by-step taking apart (or breakdown) of a spare/functional group coded Item to the level of lts least
componency identified as maintenance significant (i.e., assigned as SMR code) for the category of maintenance under consideration.
5
Actions - welding, grinding, riveting, straightening, facing, remachinery, and/or resurfacing.
B-1
TM 9-1040-267-20&P
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