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TM 9-2330-202-14&P
E-3.
EXPLANATION OF COLUMNS (SECTIONS II AND III) (CONTINUED).
NOTE
Cannibalization of controlled exchange, when authorized, may be used as a source
of supply for items with the following source codes, except for those source coded
"XA".
Code
Application/Explanation
XA . . . . . . . . . . . . . . DO NOT requisition an "XA"-coded item. Order its next higher assembly.
XB . . . . . . . . . . . . . . If an "XB" item is not available from salvage, order it using the CAGEC
and part number given.
XC. . . . . . . . . . . . . . Installation drawing, diagram, instruction sheet or 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 CAGEC and part number given, if no NSN is avail-
able.
(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:
(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 indi-
cate authorization to one of the following levels of maintenance:
Code
Application/Explanation
C . . . . . . . . . . . . . . . Operator or Crew Maintenance done within Unit Maintenance or aviation
unit maintenance.
O . . . . . . . . . . . . . . . Unit Maintenance or aviation unit can remove, replace, and use the item.
F . . . . . . . . . . . . . . . Direct Support Maintenance or aviation intermediate maintenance can
remove, replace, and use the item.
H . . . . . . . . . . . . . . . General Support Maintenance can remove, replace, and use the item.
L . . . . . . . . . . . . . . . Specialized Repair Activity (SRA) can remove, replace, and use the item.
D . . . . . . . . . . . . . . . Depot Maintenance can remove, replace, and use the item.
NOTE
Some limited repair may be done on the item at a lower level of maintenance, if
authorized by the Maintenance Allocation Chart (MAC) and SMR codes.
(b) The maintenance code entered in the fourth position tells whether or not the item is to
be repaired and identifies the lowest maintenance level with the capability to do complete repair (i.e., perform all
authorized "Repair" functions). The maintenance code in the fourth position will indicate authorization to one of the
following levels of maintenance:
Code
Application/Explanation
O . . . . . . . . . . . . . . . Unit Maintenance or aviation unit maintenance is the lowest level that can
do complete repair of the item.
F . . . . . . . . . . . . . . . Direct Support Maintenance or aviation intermediate maintenance is the
lowest level that can do complete repair of the item.
E-3

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