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TM 5-4320-273-24P
AO - (Assembled by org/AVUM
Level)
Explanation
AF - (Assembled by DS/AVIM
Items with these codes are not to be requested/requisitioned
Level
individually. The parts that make up the assembled item must
AH - (Assembled by GS
be requisitioned or fabricated and assembled at the level of
Category)
maintenance indicated by the source code. If the 3d position
A L - (Assembled by SRA)
code of the SMR code authorizes you to replace the item, but
AD - (Assembled by Depot)
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 -- If an “XB” item is not available from salvage, order it using the FSCM and part number given.
XC -- Installation drawing, diagram, instruction sheet, field service drawing, that is identified by
Reciprocating Compressor 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 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 maintenance.
Code
C
-
O
-
F
-
H
-
L
-
D
-
Application/Explanation
Crew or operator maintenance done within organizational or aviation unit maintenance.
Organizational or aviation unit category can remove, replace, and use the item.
Direct support or aviation intermediate level can remove, replace, and use the item.
General support level can remove, replace, and use the item.
Specialized repair activity can remove, replace, and use the item.
Depot level can remove, replace, and use the item.
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