TM 10-4930-351-24P
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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 follow:
Application/Explanation
Source Code
PA
PB
Stocked items; use the applicable NSN to request/requisition items with
PC
these source codes. They are authorized to the category indicated by the
PD
code entered in the 3rd position of the SMR code.
PE
PF
NOTE
PG
KD
Items with these codes are not to be requested/requisitioned individually.
KF
They are part of a kit which is authorized to the maintenance level
KB
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.
MO - Made at Unit/AVUM Level
MF - Made at DS/AVIM Level
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
MH - Made at GS Level
ML - Made at SRA
in the bulk material group work package of the RPSTL. If the item is
MD - Made at Depot
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.
AO - Assembled by Unit/AVUM level
The parts that make up the assembled item must be requisitioned or
AF - Assembled by DS/AVIM level
fabricated and assembled at the level of maintenance indicated by the
AH - Assembled by GS level
source code. If the 3rd position of the SMR code authorizes you to
AL - Assembled by SRA
replace the item, but the source code indicates the item is assembled at a
AD - Assembled by Depot
higher level, order the item from the higher level of maintenance.
Do not requisition an "XA" coded item. Order the next higher assembly.
XA
(Refer to the NOTE below.)
If an item is not available from salvage, order it using the CAGEC and
XB
P/N.
Installation drawings, diagrams, instruction sheets, field service drawings;
XC
identified by manufacturer's P/N.
Item is not stocked. Order an XD-coded item through normal supply
XD
channels using the CAGEC and P/N given, if no NSN is available.
NOTE
Cannibalization or controlled exchange, when authorized, may be used as a source of supply for items with the
above source codes except for those source coded "XA" or those aircraft support items restricted by requirements of
AR 750-1.
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