TM 1-4920-449-13&P
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 re-
quirements of AR 700-42.
(2) Maintenance Code. Maintenance codes tell YOU the category 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 category au-
thorized to remove, replace, and use an item. The maintenance code entered in the third position will indicate au-
thorization to one of the following categories of maintenance.
Code
Application/Explanation
C
Crew or operator maintenance done within organizational or avia-
tion unit maintenance.
O
Organizational or aviation unit category can remove, replace, and
use the item.
F
H
L
D
Direct support of aviation intermediate category can remove, re-
place, and use the item.
General support category can remove, replace, and use the item.
Specialized repair activity can remove, replace, and use the item.
Depot category can remove, replace, and use the item.
(b) The maintenance code entered in the fourth position tells you whether or not the item is to be re-
paired and identifies the lowest maintenance category with the capability to do complete repair (i.e., perform all
authorized repair functions). (NOTE: Some limited repair may be done on the item at a lower category of mainte-
nance, if authorized by the Maintenance Allocation Chart (MAC) and SMR codes.) This position will contain one
of the following maintenance codes.
Code
Application/Explanation
O
Organizational or aviation unit is the lowest category that can do
complete repair of the item.
F
Direct support or aviation intermediate is the lowest category that
can do complete repair of the item.
H
L
General support is the lowest category that can do complete repair
of the item.
Specialized repair activity (designate the specialized repair activity)
is the lowest category that can do complete repair of the item.
D-3
