TM-9-2350-253-20P-1
TANK, COMBAT, FULL-TRACKED: 105-MM GUN, M60A3 AND M60A3 TTS HULL
TECHNICAL MANUAL; UNIT MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LIST
TM-9-2350-253-20P-1 - Page 15 of 724
TM 9-2350-253-20P-1
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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
Application/Explanation
PA
Stocked items; use the applicable NSN to
PB
request/requisition items with these source
PC*
*
codes.
They are authorized to the category
PD
indicated by the code entered in the 3d
PE
position of the SMR code.
PF
PG
**Items coded PC are subject to deterioration.
KD
Items with these codes are not to be re-
KF
quested/requisitioned individually.
They are
KB
part of a kit which is authorized to the
maintenance category indicated in the 3d
position of the SMR code.
The complete
kit must be requisitioned and applied.
MO-(Made at UM/
Items with these codes are not
AVUM Level)
to be requested/requisitioned
individually.
They must be
MF-(Made at DS/
made from bulk material which
AVUM Level)
is identified by the part num-
MH-(Made at GS
ber
in
the
DESCRIPTION
AND USABLE ON CODE
(UOC) column and listed in
ML-(Made at Spe-
the Bulk Material group of the
cialized Repair
repair parts list in this RPSTL.
Act (SRA))
If the item is authorized to you
by the 3d position code of the
MD-(Made at Depot)
SMR
code, but the source
code indicates it is made at a
higher level, order the item
from the higher level of main-
tenance.
AO-(Assembled by
Items with these codes are not
UM/AVUM Level)
to be requested/requisitioned
individually.
The parts that
AF-(Assembled by
make up the assembled item
DS/A VUM Level)
must be requisitioned or fabri-
AH-(Assembled by
cated and assembled at the
GS Category
level of maintenance indicated
by the source code.
If the 3d
AL-(Assembled by
position code of the SMR code
SRA)
authorizes you to replace the
item, but the source code indi-
AD-(Assembled by
cates the item is assembled at
Depot)
a higher level, order the item
from the higher level of main-
tenance.
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 the
manufacturer’s part number.
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 source of supply for items
with the above source codes, except for those source
coded "XA" or those aircraft support items restricted by
requirements of AR 700-42.
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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:
(a
)
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 unit
maintenance or aviation unit maintenance.
O -
Unit maintenance or aviation unit category can
remove, replace, and use the item.
F-
Direct Support or aviation intermediate 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.
(b
)
The maintenance code entered in the fourth
position tells whether or not the item is to be repaired
and identifies the lowest maintenance level with the
capability to do complete repair (i.e., perform all
authorized repair functions.) (NOTE: Some limited repair
may be done on the item at a lower level of maintenance,
if authorized by the Maintenance Allocation Chart (MAC)
and SMR codes.) This position will contain one of the
following maintenance codes:
2
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