TM 9-4310-394-23P
Code
Explanation
MO (Made at org AVUM
Items with these codes are not to be requested/requisitioned
level)
individually. They must be made from bulk material which is
MF (Made at DS/AVUM
identified by the part number in the DESCRIPTION and USABLE
level)
ON CODE (UOC) column and listed in the Bulk Material group of the
MH (Made at GS level)
repair parts list in the RPSTL. If the item is authorized to you by the
ML (Made at Specialized
3rd position code of the SMR code, but the source code indicates it
Repair Activity (SRA))
is made at a higher level, order the item from the higher level of
MD (Made at Depot)
maintenance.
Code
Explanation
AO (Assembled by org
Items with these codes are not to be requested/requisitioned
AVUM
individually. The parts that make up the assembled item must be
Level)
requisitioned or fabricated and assembled at the level of
AF (Assembled by
maintenance indicated by the source code. If the 3rd position code
DS/AVUM
of the SMR code authorizes you to replace the item, but the
Level)
source code indicates the items are assembled at a higher level,
AH (Assembled by GS
order the item from the higher level of maintenance.
Category)
AL (Assembled by SRA)
AD (Assembled by Depot)
Code
Explanation
XA - - Do not requisition an "XA"-coded item. Order its next higher assembly. (Also, refer to the NOTE below.)
XB - - If an "XB" item is not available from salvage, order it using the FSCM and part number given.
XC - - Installation drawing, diagram, instruction sheet, field service drawing, that is identified by manufacturer's part
number.
XD - - Item is not stocked. Order an "XD"-coded item through normal supply channels using the FSCM 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
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