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TM 9-4120-388-24P
(1) Source Code. The source code tells you how to get an item needed for maintenance, repair, or
overhaul of an end item/equipment. Explanations of source codes follows:
Source Code
Explanation
PA
PB
PC**
PD
PE
PF
PG
KD
KF
KB
MO-
MF-
MH-
ML-
MD-
AO-
AF-
AH-
AL-
AD-
XA-
XB-
XC-
XD-
Stocked items; use the applicable NSN to request/requisition items with these
source codes. They are authorized to the category indicated by the code
entered in the 3rd position of the SMR code:
**NOTE: Items coded PC are subject to deterioration.
Items with these codes are not to be requested/requisitioned individually. They
are part of a kit which is authorized to the maintenance category indicated in the
3rd position of the SMR code. The complete kit must be requisitioned and
applied.
(Made at Unit/AVUM
Level)
(Made at DS/AVUM
Level)
(Made at GS Level)
(Made at Specialized
Repair Activity (SRA))
(Made at Depot)
(Assembled by Unit/AVUM
Level)
(Assembled by DS/AVIM
Level)
(Assembled by GS
Category)
(Assembled by SRA)
(Assembled by Depot)
Items with these codes are not to be requested/requisitioned
individually. They must be made from bulk material which
is identified by the part number in the DESCRIPTION and
USABLE ON CODE (UOC) column and listed in the Bulk
Material group of the repair parts list in this RPSTL. If the
item is authorized to you by the 3rd position code of the SMR
code, but the source code indicates it is made at a higher
level, order the item from the higher level of maintenance.
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
3rd position code of the SMR code authorizes you
to replace the item, but the source code indicates
the items are assembled at a higher level, order the
item from the higher level of maintenance.
Do not requisition “XA’-coded item. Order its next higher assembly. (Refer to the NOTE.)
If an “XB” item is not available from salvage, order it using the CAGEC and part number given.
Installation drawing, diagram, instruction sheet, field service drawing, that is identified manufacturer’s part
number.
Item is not stocked. Order an “XD’’-coded item through normal supply channels using the CAGEC and part
number given, if no NSN is available.
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