TM 10-5410-228-24P
(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
Stocked items; use the applicable NSN to request/requisition items with these source
PB
codes. They are authorized to the category indicated by the code entered in the 3rd
PC**
position of the SMR code.
PD
PE
PF
PG
Items with these codes are not to be requested/requisitioned individually. They are part
KD
of a kit which is authorized to the maintenance category indicated in the 3rd position of
KF
the SMR code. The complete kit must be requisitioned and applied.
KB
MO - (Made at Unit/
AVUM Level)
Items with these codes are not to be requested/requisitioned individually.
MF - (Made at DS/AVIM
They must be made from bulk material which is identified by the part number
Level)
in the DESCRIPTION and USABLE ON CODE (UOC) column and listed in
MH - (Made at GS
the Bulk Material group of the repair parts listed in the RPSTL. If the item is
Level)
authorized to you by the 3rd position code of the SMR code, but the source
ML - (Made at
code indicates it is made at a higher level, order the item from the higher level
Specialized Repair
of maintenance.
Activity (SRA))
MD - (Made at Depot)
AO - (Assembled by
Unit/AVUM Level)
AF - (Assembled by
Items with these codes are not to be requested/requisitioned individually.
DS/AVIM Level)
The parts that make up the assembled item must be requisitioned or
AH - (Assembled by GS
fabricated and assembled at the level of maintenance indicated by the
Level)
source code. If the 3rd position code of the SMR code authorizes you to
AL - (Assembled by
replace the item, but the source code indicates the items are assembled at a
Specialized Repair
higher level, order the item from the higher level of maintenance.
Activity (SRA))
AD - (Assembled by
Depot)
XA -
Do not requisition "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 part 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.
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