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:
Stocked items; use the applicable NSN to request/requisition items with these source codes.
They are authorized to the category indicated by the code entered in the 3rd position of the
**NOTE: Items coded PC are subject to deterioration.
Items with these codes are not to be requested/requisitioned individually. They are part of a
kit which is authorized to the maintenance category 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.
They must be made from bulk material which is identified by the part
number in the DESCRIPTION and USABLE ON CODE (UOC) column
and listed in the Bulk Mate- rial group of the repair parts list in this
RPSTL. If the item is 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. The parts that make up the assembled item must be
requisitioned or fabricated and assembled at the level of maintenance
indicated by the source code. If the3rd position code of the SMR code
authorizes you to replace the item, but the source code indicates the
items are assembled at a higher level, order the item from the higher
level of maintenance.
Do not requisition "XA"-coded item. Order its next higher assembly. (Refer to the NOTE below.)
If an "XB" item is not available from salvage, order it using the CAGEC and part number given.
Installation drawing, diagram, instruction sheet, field service drawing, that is identified manufacturer's part
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.
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.
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:
(Made at Unit/AVUM Level)
(Made at DS/AVIM Level)
(Made at GS Level)
(Made at Specialized Repair
(Made at Depot)
(Assembled by Unit/AVUM
(Assembled by DS/AVIM
(Assembled by GS Category)
(Assembled by SRA)
(Assembled by Depot)
(Assembled by Depot)