TM 10-7310-241-12&P
C-3. EXPLANATION OF COLUMNS (Sections II and III) (Continued)
(1) Source Code. The source code describes how to get an item needed for maintenance, repair or overhaul of an end
item/equipment. Explanations of the source codes are as follows:
Code
Explanation
PA
Stocked items. Use the applicable NSN to request/requisition items
PB
with these source codes. They are authorized to the category indicated
PC**
by the code entered in the 3rd position of the SMR code.
PD
PE
**NOTE: Items coded PC are subject to deterioration.
PF
PG
KD
Items with these codes are not to be requested/requisitioned
KF
individually. They are part of a kit which is authorized to the
KB
maintenance category indicated in the 3rd position of the SMR
code. The complete kit must be requisitioned and applied.
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)
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
ML
(Made at Specialized
the code entered in the 3rd position of the SMR code, but the source
Repair Activity (SRA))
code indicates that it is made at a higher level, order the item from
MD
(Made at Depot)
the higher level of maintenance.
AO
(Assembled by org/AVUM
Items with these codes are not to be requested/requisitioned
Level)
individually. The parts that make up the assembled item must be
AF
(Assembled by DS/AVIM
requisitioned or fabricated and assembled at the level of maintenance
Level)
indicated by the source code. If the code entered in the 3rd
AH
(Assembled by GS
position of the SMR code authorizes you to replace the item but the
Category)
source code indicates that the item is assembled at a higher level,
AL
(Assembled by SRA)
order the item from the higher level of maintenance
AD
(Assembled by Depot)
XA
Do not requisition an "XA"-coded item. Order its next higher assembly. (See NOTE).
XB
If an "XB"-coded item is not available from salvage, order it using the CAGEC and part number
given.
XC
Installation drawing, diagram, instruction sheet or 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 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 the requirements of AR 700-42.
C-2
