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 not stocked.
Order an XD coded item through normal supply
channels using the FSCM and part number given, if not NSN is available.
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.
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-
-Crew or operator maintenance done within organizational
or aviation unit maintenance.
-Organizational or aviation unit category can remove,
replace, and use the item.