TM 9-4310-396-23P
Explanation
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 level of maintenance
indicated by the source code. If the 3rd 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.
Code
Explanation
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.
NOTE
Cannibalization or controlled exchange, when authorized, may be used as a
source of supply items with the above source codes, except for those source coded
"XA" or those aircraft support items restricted by requirements of AR 700-42.
(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
authorized to remove, replace, and use an item. The maintenance code entered in the third position will
indicate authorization to one of the following levels of maintenance.
Code
Application/Explanation
C
-Crew or operator maintenance done within organizational or aviation
unit maintenance.
O
-Organizational or aviation unit category can remove, replace, and use the
item.
F
-Direct support or aviation intermediate level can remove, replace, and
use the item.
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