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 SMR code.
** Items coded PC are subject to deterioration.
Items with these codes are not to be requested/requisitioned individually. They re 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 Material group of the repair parts list in this
RPSTL. H 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 puts that make up the assembled item must be
requisitioned or fabricated and assembled at the level of maintenance
indicated by the source code. H the 3rd 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 UXB" 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
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
(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 codes:
Unit maintenance or aviation unit is the lowest level that can do complete repair of the item.
Direct support or aviation intermediate is the lowest level than can do complete repair of the item.
(Made at Unit/AVUM
(Made at DS/AVUM
(Made at GS Level)
(Made at Specialized
Repair Activity (SRA))
(Made at Depot)
(Assembled by GS
(Assembled by SRA)
(Assembled by Depot)