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 in the repair parts
list in this RPSTL. If the item is authorized to you by the 3d position code of the SMR code, but the source code indicates it is made at
a higher level, order the item from the higher level of maintenance.
Items with these codes are not to be requested/requisitioned individually. The parts that makeup 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 item is 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 manufacturer's part number.
XD - Item 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".
(2) Maintenance code. Maintenance codes tell 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: