TM 10-4610-243-23P
(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
Explanation
Code
PA
PB
PC**
Stocked items; use the applicable NSN to request /requisition items with these source codes.
PD
They are authorized to the category indicated by the code entered in the 3rd position of the
PE
SMR code.
PF
**NOTE: Items coded PC are subject to deterioration.
PG
KD
Items with these codes are not to be requested/requisitioned individually. They are part of a
KF
kit which is authorized to the maintenance category indicated in the 3rd position of the SMR
KB
code. The complete kit must be requisitioned and applied.
MO
Made at Unit/AVUM Level)
Items with these codes are not to be requested/requisitioned
individually. They must be made from bulk material which is
MF
(Made at DS/AVIM Level )
identified by the part number in the DESCRIPTION and
MH
(Made at GS Level)
USABLE ON CODE (UOC) column and listed in the Bulk
ML
(Made at Specialized Repair
Material group of the repair parts list in this RPSTL. If the
Activity (SRA))
item is authorized to you by the 3rd position code of the
MD
(Made at Depot)
SMR code, but the source code indicates it is made at a higher
level, order the item from the higher level of maintenance.
AO
(Assembled by Unit/AVUM
Items with these codes are not to be requested/requisitioned in-
Level)
dividually. The parts that make up the assembled item must
be requisitioned or fabricated and assembled at the level of
AF
(Assembled by DS/AVIM
maintenance indicated by the source code. If the 3rd position
Level D
code of the SMR code authorizes you to replace the item, but
AH
(Assembled by GS Category)
the source code indicates the items are assembled at a higher
AL
(Assembled by SRA.
Level, order the item from the higher level of maintenance.
AD
(Assembled by Depot)
XA
Do not requisition 'XA"-coded item. Order its next higher assembly. (Refer to the NOTE-below.)
XB
If an UXBE 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.
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.
(2) Maintenance Code. Maintenance codes tell you the level(s) of maintenance authorized to USE and
REPAIR support items. The maintenance codes are entered in the third and fourth positions of the SMR code
as follows:
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