TM 9-2330-390-14&P
C-3.
EXPLANATION OF COLUMNS (SECTIONS II AND III) (Cont).
Code
Application/Explanation
XC . . . . . . . . . . . . installation drawing, diagram, instruction sheet, or field service drawing
that is identified by manufacturers part number.
XD . . . . . . . . . . . . . Item is not stocked. Order an XD-coded item through normal supply
channels using the CAGE and part number given, if no NSN is available.
(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
foiiows:
(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
. . . . . . . . . . . . . . Operator or Crew Maintenance done within Unit Maintenance or aviation
unit maintenance.
O . . . . . . . . . . . . . .
Unit Maintenance or aviation unit maintenance 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). me maintenance code entered 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 than can do complete repair of the item.
H . . . . . . . . . . . . . . General Support Maintenance is the lowest level that can do complete
repair of the item.
C-3