TM 10-1670-277-23&P
0057 00
0057 00-3
SOURCE CODE – continued
EXPLANATION - continued
XC -
Installation drawings, diagrams, instruction sheets,
field service drawings; identified by manufacturer’s
P/N.
XD -
Item is not stocked. Order an XD-coded item
through normal supply channels using the
CAGEC and P/N given, if no NSN is available.
NOTE
Cannibalization or controlled exchanged, 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.
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 follow:
Third position. 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.
MAINTENANCE CODE
APPLICATION/EXPLANATION
C -
Crew or operator maintenance done within
unit/AVUM maintenance.
O -
Unit level/AVUM maintenance can remove,
replace, and use the item.
F -
Direct support/ AVIM maintenance can remove,
replace, and use the item.
H -
General support maintenance can remove,
replace, and use the item.
L -
Specialized repair activity can remove, replace,
and use the item.
D -
Depot can remove, replace, and use the item.
