MO- (Made at unit
Items with these codes are not to be requested/
requisitioned individually. They must be made
MF- (Made at DS/
from bulk material which is identified by the
part number in the DESCRIPTION AND USABLE ON.
MH- (Made at GS
CODE (UOC) column and listed in the Bulk Material
group of the repair parts list in this RPSTL.
ML- (Made at Spe-
If the item is authorized to you by the 3d
position code of the SMR code, but the source
code indicates it is made at a higher level, order
MD- (Made at Depot)
the Item from the higher level of maintenance.
AO- (Assembled by
Items with these codes are not to be requested
requisitioned individually. The parts that make
AF- (Assembled by
up the assembled item must be requisitioned or
fabricated and assembled at the level of mainte-
AH- (Assembled by
nance indicated by the source code. If the
3d position code of the SMR code authorizes you to
AL- (Assembled by
replace the item, but the source code Indicates
the item is assembled at a higher level, order
AD- (Assembled by
the item from the higher level of maintenance.
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 drawing, that is identified by manufacturer's part
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.
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 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 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.