TM5-3810288-20P
(1) Source Code. The source code tells you how you get an item needed for maintenance, repair, or overhaul of
an end item/equipment. Source codes are always the first two positions of the SMR code. Explanations of source codes
follow:
Code
Explanation
}
PA
PB
PC
Stocked items; use the applicable NSN to request/requisition items with these source
PD
codes They are authorized to the category indicated by the code entered in the 3d
PE
position of the SMR code.
PF
PG
}
KD
Items with these codes are not to be requested/requisitioned individually. They are part
KF
of a kit which is authorized to the maintenance category indicated in the 3d position of
KB
the SMR code. The complete kit must be requisitioned and applied.
MO-(Made at
Org
Items with these codes are not to be requested/
Category)
requisitioned individually. They must be made from bulk
}
MF-(Made at
material which is identified by NSN in the Description
DS
column and listed in the Bulk Material group in the repair
Category)
parts list in this manual. If the item is authorized to you
MH-(Made at
by the 3d position code of the SMR code, but the source
GS
code indicates it is made at a higher category, order the
Category)
item from the higher category of maintenance.
MD-(Made at
Depot)
AO-(Assembled
by Org
Items with these codes are not to be requested/
Category)
requisitioned individually. The parts that make up the
}
AF-(Assembled
assembled item must be requisitioned or fabricated and
by DS
assembled at the category of maintenance indicated by
Category)
the source code. If the 3d position code of the SMR
AH-(Assembled
code authorizes you to replace the item, but the source
by GS
code indicates the item is assembled at a higher
Category)
category, order the item from the higher category of
AD-(Assembled
maintenance.
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. Not applicable.
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".
(2) Maintenance Code. Maintenance codes tell you the category(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 category authorized to
remove, replace, and use an item. The maintenance code entered in the third position will indicate authorization to one of
the following categories of maintenance.
2
