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
third position of the SMR code.
Items with these codes are not to be requested/requisitioned individually. They are
part of a kit which is authorized to the maintenance category indicated in the third
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 be made from bulk material which is identified by the part
number in the description and usable on code (UOC) column and listed in
the Bulk Material group of the repair parts list. 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 category, order the item from the higher
category 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 category of maintenance indicated by
the source code. If the disposition code of the SMR code authorizes you to
replace the item, but the source code indicates the item is assembled at a
higher category, order the item from the higher category of mainte-
XADo not requisition an "XA" coded item. Order its next higher assembly.
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
XDItem 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 750-1.
(2) Maintenance code. Maintenance codes tell you the category 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
(a) The maintenance code entered in the third position tells you the lowest maintenance category authorized