TM 9-3950-253-13&P
0094
Table 2. Source Code Explanation - Continued.
Source Code
Application Explanation
AF
Assembled by maintainer
class
Items with these codes are not to be requested/requisitioned individually.
AH
Assembled by below
The parts that make up the assembled item must be requisitioned or
depot sustainment class
fabricated and assembled at the level of maintenance indicated by the
source code. If the third position of the SMR code authorizes you to replace
AL
Assembled by SRA
the item, but the source code indicates the item is assembled at a higher
level, order the item from the higher level of maintenance.
AD
Assembled by depot
AG
Navy only
XA
Do not requisition an "XA" coded item. Order the next higher assembly.
(Refer to NOTE below.)
XB
If an item is not available from salvage, order it using the CAGEC and P/N.
XC
Installation drawings, diagrams, instruction sheets, field service drawings;
identified by manufacturer s P/N.
XD
Item is not stocked. Order an XD-coded item through local purchase or
normal supply channels using the CAGEC and P/N 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 items source coded "XA"
or those aircraft support items restricted by requirements of AR 750-1.
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:
Third Position. The maintenance code entered in the third position tells you the lowest maintenance class
authorized to remove, replace, and use an item. The maintenance code entered in the third position will indicate
authorization to the following classes of maintenance:
Maintenance Code
Application/Explanation
C
Crew (operator) can remove, replace, and use the item.
F
Maintainer maintenance can remove, replace, and use the item.
H
Below Depot Sustainment maintenance can remove, replace, and use the
item.
L
Specialized repair activity can remove, replace, and use the item.
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