Items with these codes are not to be requested requisi
tioned 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 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 "XA" -coded item. Order its next higher assembly. (Also, refer to the NOTE be-
XB If an XB item is not available from salvage, order it using the CAGEC and part number given.
X C Installation drawing, diagram, instruction sheet, field service drawing, that is identified by manufac-
turers part number.
XD - Item is not stocked. Order an XD -coded item through normal supply channels using the CA-
GEC 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 re-
stricted by requirements of AR 7501.
(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 au-
thorized to remove, replace, and use an item. The maintenance code entered in the third posi-
tion will indicate authorization to one of the following levels of maintenance.
Crew or operator maintenance done within unit or aviation unit maintenance.
Unit or aviation unit category can remove, replace, and use the item.