TM-1-4940-355-12-P
SHOP EQUIPMENT CONTACT MAINTENANCE (SECM) P/N 50154-001, MOUNTED ON HIGH MOBILITY MULTI PURPOSE WHEELED VEHICLE (HMMWV) HEAVY (HVY) MODEL M1097A2
TECHNICAL MANUAL; OPERATOR’S AND UNIT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
SEPTEMBER 2003
TM-1-4940-355-12-P - Page 104 of 164
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TM 1-4940-355-12&P
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Source Code.
The source code tells you how you get an item needed for maintenance, repair, or overhaul of an
end item/equipment.
Explanations of source codes follow:
SOURCE CODE:
APPLICATION/EXPLANATION
PA
PB
PC
PD
PE
PF
PG
Stock items; use the applicable NSN to requisition/request items with
these source codes.
They are authorized to the level indicated by the
code entered in the 3
rd
position of the SMR code.
NOTE
Items coded PC are subject to
deterioration.
KD
KF
KB
Items with these codes are not to be requested/requisitioned individually.
They are part of a kit, which is authorized to the maintenance level
indicated in the 3
rd
position of the SMR code.
The complete kit must be
requisitioned and applied.
MO-Made at unit/ AVUM
level
MF-Made at DS/ AVIM level
MH-Made at GS level
ML-Made at SRA
MD-Made at depot
Items with these codes are not to be requisitioned/requested
individually.
They must be made from bulk material which is identified
by the P/N in the DESCRIPTION AND USABLE ON CODE (UOC)
column and listed in the bulk material group work package of the
RPSTL.
If the item is authorized to you by the 3
rd
position code of the
SMR code, but the source code indicates it is made at higher level,
order the item from the higher level of maintenance.
AO-Assembled by
unit/AVUM level
AF-Assembled by DS/AVIM
level
AH-Assembled by GS level
AL-Assembled by SRA
AD-Assembled by depot
Items with these codes are not to be requested/requisitioned
individually.
The parts that make up the assembled item must be
requisitioned or fabricated and assembled at the level of maintenance
indicated by the source code.
If the 3
rd
position of the SMR code
authorizes you to replace the item, but the source code indicates the
item is assembled at a higher level, order the item from the higher
level of maintenance.
XA
Do not requisition an "XA" coded item.
Order the next higher assembly.
(Refer to NOTE below.)
XB
If an item is not available from salvage, order it using the CAGEC and P/N.
XC
Installation drawings, diagrams, instruction sheets, field service drawings;
identified by manufacturer's P/N.
XD
Item is not stocked.
Order an XD-coded item through normal supply channels
using the CAGEC and P/N given, if no NSN is available.
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