TM 1-4920-446-13 & P
Items with these codes are not to be requested/requisi
tioned 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 3rd position code of the SM&R code
authorizes you to replace the item, but the source code indicates the
AL- Assembled by SRA)
item is assembled at a higher level, order the item from the higher
level of maintenance
Do not requisition an "XA"-coded item. Order its next higher assembly.
(Refer to the NOTE below.)
If an "XB" item is not available from salvage, order it using the CAGE code
and part number given.
Installation drawing, diagram, instruction sheet, field service drawing, that is
identified by manufacturer's part number.
Item is not stocked. Order an "XD"-coded item through normal supply
channels using the CAGE code and part number given, if no NSN is
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 restricted aircraft support items (refer to AR 750-1).
(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 SM&R 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 codes are 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 item.
-Depot level can remove, replace, and use the item.