Items with these codes are not to be requested/ requisitioned
individually. The parts that make up the assembled item must be
requisitioned or fabricated and assembled at the level of
maintenance indicated by the source code. If the 3d position code of
the SMR code authorizes you to replace the item, but the source
XA - Do not requisition an XA-coded item.
indicates the item is assembled at a higher level, order the
from the higher level of maintenance.
Order its next higher assembly. (Also, refer to the NOTE
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 drawing, that is identified by
manufacturers 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 available.
NOTE: Cannibalization or controlled exchange, when authorized, maybe used as a source of supply for
items with the above source codes, except for those source coded X or those aircraft support items
restricted by requirements of AR 700-42.
F-3.2.2 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:
F-18.104.22.168 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.
-Crew or operator maintenance done within unit or aviation unit maintenance.
-Unit or aviation unit level can remove, replace, and use the item.
-Direct support or aviation intermediate level can remove, replace, and use the item.
-General support level can remove, replace, and use the item.
-Specialized repair activity can remove, replace, and use the item.
-Depot level can remove, replace, and use the item.
F-22.214.171.124 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.
Change 1 F-3