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TM 1-1730-231-13&P
Code
Explanation
MO-(Made at org/
Items with these codes are not to be request-
AVUM Level)
ed/requisitioned individually. They must be
MF-(Made at DS/
made from bulk material which is identified
AVIM Level)
by the part number in the DESCRIPTION AND
MH-(Made at GS
>
USABLE ON CODE (UOC) column and listed in the
Level)
Bulk Material group of the repair parts list
ML-(Made at Spe-
in this RPSTL. If the item is authorized to
cialized Repair
you by the 3rd position code of the SMR code,
Act [SRA])
but the source code indicates it is made at a
MD-(Made at Depot)
higher level, order the item from the higher
level of maintenance.
Code
Explanation
AO-(Assembled by
Items with these codes are not to be request-
org/AVUM Level)
ed/requisitioned individually. The parts
AF-(Assembled by
that make up the assembled item must be
DS/AVIM Level)
requisitioned or fabricated and assembled at
AH-(Assembled by
>
the level of maintenance indicated by the
GS Category)
source code. If the 3rd position code of the
AL-(Assembled by
SMR code authorizes you to replace the item,
SRA)
but the source code indicates the item is
AD-(Assembled by
assembled at a higher level, order the item
Depot)
from the higher level of maintenance.
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 code 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 CAGE code 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 restricted aircraft support items (refer to AR 750-1).
(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 Indicate authorization to
one of the following levels of
C-3
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