TM 1-1730-229-24P
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EXPLANATION OF COLUMNS IN THE REPAIR PARTS LIST AND SPECIAL TOOLS LIST WORK PACKAGES
CONTINUED
Source Codes Continued
Application/Explanation
Source Code
Items with these codes are not to be requested/req-
AO-Assembled by Service/AMC level
uisitioned individually. The parts that make up the
AF-Assembled by Field/ASB level
assembled item must be requisitioned or fabricated and
AH-Assembled by Below Depot Sustainment level
assembled at the level of maintenance indicated by
the source code. If the third position of the SMR code
AL-Assembled by SRA/TASMG
authorizes you to replace the item, but the source code
AD-Assembled by depot
indicates the item is assembled at a higher level, order
the item from the higher level of maintenance.
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, f eld
service drawings; identif ed 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 level autho-
rized to remove, replace, and use an item. The maintenance code entered in the third position will indicate authoriza-
tion to the following levels of maintenance:
Third Position Maintenance Codes
Maintenance Code
Application/Explanation
Crew or operator maintenance done within Field
C-
maintenance.
O-
Service/AMC maintenance can remove, replace,
and use the item.
F-
Field/ASB maintenance can remove, replace,
and use the item.
H-
Below depot sustainment can remove, replace,
and use the item.
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