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![]() TM 9-2320-361-24P 
0001 00 
Source Code. The source code tells you how to get an item needed for maintenance, repair, or overhaul 
of an end item/equipment. Explanations of source codes follows: 
Code 
Explanation 
Stocked items; use the applicable NSN to request/requisition items 
PA 
with these source codes. They are authorized to the category 
PB 
indicated by the code entered in the 3rd position of the SMR code. 
PC** 
PD 
** NOTE: Items coded PC are subject to deterioration. 
PE 
PF 
PG 
Items with these codes are not to be requested/requisitioned 
KD 
individually. They are part of a kit which is authorized to the 
KF 
maintenance category indicated in the 3rd position of the SMR 
KB 
code. The complete kit must be requisitioned and applied. 
Items with these codes are not to be requested/requisitioned 
MO- 
(Made at Unit Level) 
individually. They must be made from bulk material which is 
MF- 
(Made at DS Level) 
identified by the part number in the DESCRIPTION AND USABLE 
MH- 
(Made at GS Level) 
ON CODE (UOC) column and listed in the bulk material group of 
ML- 
(Made at Specialized 
the repair parts list in the RPSTL. If the item is authorized to you 
Repair Act (SRA)) 
by the 3rd position code of the SMR code, but the source code 
MD- (Made at Depot) 
indicates it is made at a higher level, order the item from the 
higher level of maintenance. 
Items with these codes are not to be requested/requisitioned 
individually. The parts that make up the assembled item must be 
AO- 
(Assembled 
by 
Unit Level) 
requisitioned or fabricated and assembled at the level of 
AF- 
(Assembled 
by 
DS Level) 
maintenance indicated by the source code. If the 3rd position code 
AH- 
(Assembled 
by 
GS Level) 
of the SMR code authorized you to replace the item, but the source 
AL- 
(Assembled 
by 
SRA) 
code indicates the item is assembled at a higher level, order the 
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 CAGEC 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 CAGEC 
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. 
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 
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 
Application/Explanation 
C 
Crew or operator maintenance done within organizational maintenance. 
O 
Unit level can remove, replace, and use the item. 
F 
Direct support level can remove, replace, and use the item. 
H 
General support level can remove, replace, and use the item. 
L 
Specialized repair activity can remove, replace, and use the item. 
D 
Depot level can remove, replace, and use the item. 
0001 00-2 
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