AO- (Assembled by
AF- (assembled by
AH- (Assembled by
AL- (Assembled by
AD- (Assembled by
Items with these codes are not to be requested/requisitioned
The parts that make up the assembled item
must be requisitioned or fabricated and assembled at the
level maintenance indicated by the source code. If the 3rd
position code of the SMR code authorizes you to replace the
item, but the source code indicates the items are assembled
at a higher level, order the item from the higher level of
XA- Do not requisition an XA-coded item.
Order its next higher assembly.
refer to the NOTE below.)
XB - If an XB item is not available from salvage, order it using the CAGE and part
xc - Item is not stocked.
Indicates an installation drawing/diagram/instruction
sheet/field service drawing is/are available for use.
Order an XD - coded
item through normal supply channels using the CAGE 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 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 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.
-Crew or operator maintenance done within organizational or
aviation unit maintenance.
-Organizational or aviation unit category 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
-Depot level can remove, replace and use the item.