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
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
Do not requisition an "XA" coded item. Order its next higher assembly.
If an "XB" item is not available from salvage, order it using the FSCM and part number given.
Installation drawing, diagram, instruction sheet, field service drawing, that is identified by manufacturers part
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" 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 follows:
(a) The maintenance code entered in the third position tells you the lowest maintenance category authorized