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 3d position of the SMR
Items with these codes are not to be 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
MO-(Made at UM/AVUM
be made from bulk material which is identified by the part number DESCRIPTION AND
USABLE ON CODE (UOC) column and listed in the Bulk Material group of the repair
MF-(Made at DS/AVUM
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
MH-(Made at GS Level)
from the higher level of maintenance. Items with these codes are not to be
ML-(Made at Specialized
requested/requisitioned individually. The parts that make up the assembled item must
Repair Activity (SRA))
be requisitioned or fabricated and assembled at the level of maintenance indicted by
MD-(Made at Depot)
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
If an "XB" item is not available from salvage, order it using the CAGE and part number given.
Installation drawing, diagram, instruction sheet, field service drawing, that is identified by
the manufacturer's part number.
Item is not stocked. Order an coded item through normal supply channels using the 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
(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.