Items with these codes are not to be requested/
The parts that make
up the assembled item must be requisitioned or
fabricated and assembled at the level of main-
tenance indicated by the source code.
3d position code of the SMR code authorizes you
to replace the item, but the source code indi-
cates the item is assembled at a higher level,
order the item from the higher level of mainte-
Order its next higher
X A - Do not requisition an "XA" - coded item.
(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 manufacturer's part number.
Order an "XD" - coded item through normal
X D - Item is not stocked.
supply channels using the FSCM and part number given, if no NSN
Cannibalization or controlled exchange, when authorized, may
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.
Maintenance codes tell you the level(s)
(2) Maintenance Code.
of maintenance authorized to USE and REPAIR support items.
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
The maintenance code entered in the third position will indi-
cate authorization to one of the following levels of maintenance.
Crew or operator maintenance done within
tional or aviation unit maintenance.
Organizational or aviation unit
replace, and use the item.
Direct support or aviation intermediate
remove, replace, and use the item.