Items with these codes are not to be re-
quested/requisitioned individually. The
parts that make up the assembled item
must be requisitioned of fabricated and
assembled at the level of maintenance
indicated by the source code. If the
3rd position of the SMR code authorizes
you to replace the item, but the source
code indicates the item is assembled at
a higher level, order the item from the
the higher level of maintenance.
Do not requisition an "XA" coded item. Order the next
higher assembly. (Refer to NOTE below.)
If an item is not available from salvage, order it using the
CAGEC and P/N.
Installation drawings, diagrams, instruction sheets, field
service drawings; identified by manufacturer's P/N.
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.
Cannibalization or controlled exchange, when authorized, may
be used as a source of supply for items with the above source
codes except for those items 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
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 the following levels of maintenance:
Crew or operator maintenance done within unit/AVUM maintenance.
Unit level/AVUM maintenance can remove, replace, and use the item.
Direct support/AVIM maintenance can remove, replace, and use the item.
General support maintenance can remove, replace, and use the item.