TM 9-4520-258-24P
(1) Source Code. The source code tells you how to get an em needed for maintenance, repair, or overhaul of
an end item/equipment. Explanations of source codes follows:
XA -
Do not requisition an "XA"-coded item. Order its next higher assembly. (Refer to the NOTE below.)
Source Code
Explanation
PA
PB
PC**
PD
PE
**NOTE: Items coded PC are subject to deterioration.
PF
PG
KD
KF
KB
MO -
(Made at Unit/
AVUM Level)
MF -
(Made at DS/AVIM
Level)
MH -
(Made at GS
Level)
ML -
(Made at
Specialized Repair
Activity (SRA))
MD -
(Made at Depot)
AO -
(Assembled by
Unit/AVUM Level)
AF -
(Assembled by
DS/AVIM Level)
AH -
(Assembled by GS
Level)
AL -
(Assembled by
Specialized Repair
Activity (SRA))
AD -
(Assembled by
Depot)
XA -
Do not requisition an "XA"-coded item. Order its next higher assembly. (Refer to the NOTE below.)
XB -
If an "XB" item is not available from salvage, order it using the CAGEC and par number given.
XC -
Installation drawing, diagram, instruction sheet, field service drawing, that is identified manufacturer's part number
XD -
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.
2
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.
Items with these codes are no 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.
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 listed in the 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.
