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TB 9-2300-378-14
Explanation
Code
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 3rd position 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 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.
NOTE: Cannibalization or controlled exchange, when authorized, may be used as source of supply for
items with the above source codes, except for those source coded "XA."
Maintenance codes tell you the category(s) of maintenance authorized to
(2) Maintenance Code.
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 to remove, replace, and use an item. The maintenance code entered in the third
position will indicate authorization to one of the following categories of maintenance.
Code
Application/Explanation
C -Crew or operator maintenance done within organizational maintenance.
O -Organizational category can remove, replace, and use the item.
F -Direct support category can remove, replace, and use the item.
H -General support category can remove, replace, and use the item.
L -Specialized repair activity can remove, replace, and use the item.
D -Depot category can remove, replace, and use the item.
B-3

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