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(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
Stocked items; use the applicable NSN to request/requisition items with these source
codes. hey are authorized to the category indicated by the code entered in the 3rd
position of the SMR code.
**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 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 Material 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.
XA
Do not requisition "XA"-coded item. Order its next higher assembly. (Refer to
the NOTE below.)
XB
If an ’XB" 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:
C-2 Change 1
TM 10-6630-247-13&P
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