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TM 5-4210-218-13&P
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 CAGEC and part number given.
XC -
Installation drawing, diagram, instruction sheet, field service channels using the CAGEC and part number given.
If no NSN is available.
NOTE:
Cannibalization or controlled exchange, 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
700-42.
(2) Maintenance Code. Maintenance codes tells 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 indicate authorization to one of
the following levels of maintenance.
Code
Application/Explanation
C
-Crew or operator maintenance done within organizational or aviation unit
maintenance.
O
-Organizational or aviation unit category can remove, replace, and use the item.
F
-Direct support or aviation intermediate level can remove, replace, and use the
item.
H
-General support level can remove, replace, and use the item.
L
-Specialized repair activity can remove, replace, and use the item.
D
-Depot level can remove, replace, and use the item.
(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.) (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.) This position will contain one of the following maintenance codes.
Code
Application/Explanation
O
-Organizational or (aviation unit) is the lowest level that can do complete repair
of the item.
F
-Direct support or aviation intermediate is the lowest level that can do complete
repair of the item.
H
-General support is the lowest level that can do complete repair of the item.
L
-Specialized repair activity (designate the specialized repair activity) is the
lowest level that can do complete repair of the item.
C-3
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