Stocked Items; use the applicable NSN to request/requisition items with these source codes. They are author
ized to the category indicated by the code entered in the ad position of the SMR code.
** 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 3d 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 Material group c/a/`zed Repair of the repair parts list in this
RPSTL. If the item is authorized to you by the 3d 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
makeup the assembled item must be requisitioned or fabricated and assembled at the level of
maintenance indicted by the source code. If the 3d position code of the SMR code authorizes
you to replace the item, but the source code indicates the item is assembled at a higher level,
order the item from the higher level of maintenance.
Do not requisition an *XA"-coded item. Order its next higher assembly. (Also refer to the NOTE following. )
If an "XB" item is not available from salvage, order it using the FSCM or CAGE and part number given.
Installation drawing, diagram, instruction sheet, field service drawing, that is identified by the manufacturer's
Item is not stocked. Order an *XD"-coded item through normal supply channels using the FSCM or CAGE 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
(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:
(a) The maintenance code entered in the third position tells you the lowest maintenance level authorized to
remove, replace, and use an item. The maintenance code entered in the third position will indicate authorization to
one of the following levels of maintenance.
Crew or operator maintenance done within unit maintenance or aviation unit maintenance.
Unit maintenance or aviation unit category can remove, replace, and use the item.
Direct support or aviation intermediate level can remove, replace, and use the item.
General support level can remove, replace, and use the item.
Specialized repair activity can remove, replace, and use the item.
Depot level can remove, replace, and use the item.
(b) The maintenance code entered in the fourth position tells whether or not the item is to be repaired and
identifies the lowest maintenance level with the capability to do complete repair (i. e. , perform all authorized repair
functions). (NOTE: Some limited repair may be done on the item at a lower level of maintenance, if authorized by the
Maintenance Allocation Chart (MAC) and SMR codes. ) This position will contain one of the following maintenance
Unit maintenance or aviation unit is the lowest level that can do complete repair of the item.
MO-(Made at UM/
MF-(Made at DS/
MH-Made at GS
ML-(Made at Spe
AH ( Assembled by