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TM 10-4930-238-12&P
AO-(Assembled by
org/AVUM
Level)
AF—(Assembled by
DS/AVIM Level)
AH—(Assembled by
GS Category)
AL—(Assembled by
SRA)
AD-(Assembled by
Depot)
Explanation
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 3d position code of the SMR code authorizes you to
replace the item, but the source code indicates the items
are assembled at a higher level, order the item from the
higher level of maintenance.
Code
Explanation
XA—DO not requisition “XA” -coded item. Order its next higher assembly. (Also, refer to
the NOTE below.)
XB—lf an “XB” item is not available from salvage, order it using the CAGE and part num-
ber given.
XC—installation drawing, diagram, instruction sheet, field service drawing, that is identi-
fied by manufacturer’s part number.
XD-item is not stocked. Order an “XD” -coded item through normal supply channels using
the CAGE 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 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 autho-
rized 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.
Code
Application/Explanation
C—Crew or operator maintenance done within organizational or aviation unit maintenance.
O-Organizational or aviation unit category can remove, replace, and use the item.
F—Support or aviation intermediate level can remove, replace, and use the item.
F–3
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