TM 55-4920-244-14
CODE
Explanation
MO- (Made at org/AVUM
Items with these codes are not to be requested requisitioned in-
Level)
dividually. They must be made from bulk material which is iden-
MF-
(Made at DS/AVUM
tified by the part number in the DESCRIPTION AND USABLE
Level)
ON CODE (UOC) column and listed in the Bulk Material group of
MH-
(Made at GS Level)
the repair parts list in this RPSTL. If the item is authorized to you
ML-
(Made at Specialized
by the 3d position code of the SMR code, but the source code in-
Repair Act (SRA))
dicates it is made at a higher level, order the item from the higher
MD- (Made at Depot)
level of maintenance.
Items with these codes are not to be requested requisitioned in-
dividually. The parts that make up these 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
code indicates the item is assembled at a higher level, order 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 availabe from salvage, order it using the FSCM and part number given.
XC- Installation drawing, diagram, instruction sheet, field service drawing, that is identified by
manufacturer's part number.
XD- Item is not stocked. Order an "XD''-coded item through normal supply channels using the
FSCM 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 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:
(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 in-
dicate authorization to one of the following levels of maintenance.
C-3
