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TM 55-4920-411-13&P
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-
AO-
(Assembled by
dividually. The parts that make up these assembled item must be
org AVUM Level)
requisitioned or fabricated and assembled at the level of
AF-
(Assembled by
maintenance indicated by the source code. If the 3d position code
DS/AVIM Level)
of the SMR code authorizes you to replace the item, but the source
AH-
(Assembled by GS
code indicates the item is assembled at a higher level, order the
Category)
item from the higher level of maintenance.
AL-
[Assembled by SRA)
AD-
(Assembled by
Depot)
Do not requisition an "XA''-coded item. Order its next higher assembly. (Also, refer to the
XA-
NOTE below.)
If an "XB" item is not available from salvage, order it using the FSCM and part number given.
XB-
XC-
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 c h a n n e l s u s i n g t h e
XD-
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) T h e m a i n t e n a n c e c o d e e n t e r e d i n t h e t h i r d p o s i t i o n t e l l s y o u t h e l o w e s t m a i n t e n a n c e l e v e l
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.
Change 1 C-3

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