TM 5-4310-375-24P
Explanation
Code
AO (Assembled by
org/AVUM
level)
Items with these codes are not to be requested/requisitioned in-
AF (Assembled by
dividually. The parts that make up the assembled item must be requisi-
DS AVIM
tioned or fabricated and assembled at the category of maintenance in-
Level)
dicated by the source code. If the 3d position code of the SMR code
AH (Assembled by
authorizes you to replace the item, but the source code indicates the
GS Category)
items are assembled at a higher level, order the item from the higher
AL (Assembled by
level of maintenance.
SRA)
AD (Assembled by
Depot)
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 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 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, maybe 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 tell 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 categories of maintenance.
Application/Explanation
Code
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.
Direct support or aviation intermediate level can remove,
F
replace, and use the item.
H
General support level can remove, replace, and use the item.
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