Items with these codes are not to be requested/requisitioned individually. in the
DESCRIPTION AND USABLE ON CODE (UOC) column and listed in the Bulk Material
group of the repair parts list in the RPSTL. If the item is authorized to you by the third
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 the 3rd position code of the SMR
code authorizes you to replace the item, but the source code indicates the items 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 below).
If an "XB" item is not available for salvage, order it using the FSCM and part number given.
Installation drawing, diagram, instruction sheet, field service drawing, that is identified by a manufacturers part
Item is not stocked. Order an "XD"-coded item through normal supply channels using the FSCM 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 700-42.
(2) Maintenance Code. Maintenance codes tells 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 end item. The maintenance code entered in the third position will indicate authorization to
one of the following levels of maintenance:
KO-(Made at org/
MF-(Made at DS/
ML-(Made at Spe-
MD-(Made at Depot)