TM 1-4920-438-13&P
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EXPLANATION OF COLUMNS IN THE REPAIR PARTS LIST AND SPECIAL TOOLS LIST WORK PACKAGES
CONTINUED
Continued
SOURCE CODE
APPLICATION/EXPLANATION
XB
If an item is not available from salvage, order it using
the CAGEC and P/N.
Installation drawings, diagrams, instruction sheets,
XC
ield service drawings; identiied by manufacturer s
P/N.
XD
Item is not stocked. Order an XD-coded item through
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 sup-
port 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 au-
thorized to remove, replace, and use an item. The maintenance code entered in the third position will indicate
authorization to the following levels of maintenance:
Maintenance Code
Application/Explanation
O*
Unit level/AVUM maintenance can remove,
replace, and use the item.
F
Direct support/AVIM maintenance can remove,
replace, and use the item.
H
General Support maintenance can remove,
replace, and use the item.
L
Specialized repair activity can remove, replace,
and use the item.
G
Aloat and ashore intermediate maintenance can
remove, replace, and use the item (Navy only).
K
Contractor facility can remove, replace, and use
the item.
Z
Item is not authorized to be removed, replaced,
or used at any maintenance level.
D
Depot can remove, replace, and use the item.
*NOTE Army may use C in the third position. However, for joint service
publications, Army will use O.
Fourth Position. The maintenance code entered in the fourth position tells you whether or not the item is to
be repaired and identiies the lowest maintenance level with the capability to do complete repair (perform all au-
thorized repair functions).
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