Items with these codes are not to be requested/requisitioned
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 3d 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 an XA coded item. Order its next higher assembly.
(Also, refer to the NOTE below).
XB-If an XB item is not available from salvage, order it using the FSCM and
part number given.
XC-Installation drawing diagram, instruction sheet, field service drawing, that
is identified by manufacturers part number.
XD-Item is riot stocked.
Order an XD coded item through normal supply
channels using the FSCM 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 700-42.
(2) Maintenance Code.
Maintenance codes tells you the level(s) of mainte-
nance authorized to USE and REPAIR support items. The maintenance
codes are entered in the third and fourth positions of the SMR Code
(a) The maintenance code entered in the third position tells you the
lowest maintenance level authorized to remove, replace, and use
The maintenance code entered in the third position will
indicate authorization to one of the following levels of mainte-
C o de
-Crew or operator maintenance done within organizational
or aviation unit maintenance.
-Organizational or aviation unit category can remove,
replace, and use the item.