TM-9-2320-273-24P
M939 SERIES TRUCK TRACTOR AND TRUCK CHASSIS
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT; MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LISTS
FEBRUARY 1990
TM-9-2320-273-24P - Page 15 of 1105
SECTION I TM 9-2320-273-24P
(1)
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
l *Items coded PC are subject to deteriora-
tion.
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/
A VUM Level)
MF-(Made at lDS/
A VUM Level)
MH-(Made at IGS
Level)
ML-(Made at Spe-
cialized Repair
Act (SRA))
MD-(Made at Depot)
AO-(Assembled by
UM/AVUM Level)
AF-(Assembled by
lDS/AVIM Level)
AH-(Assembled by
IGS Category
AL-(Assembled by
SRA)
AD-(Assembled by
Depot)
XA -
Do
not
Items with these codes are not
to be requested/requisitioned
individually. They must be
made from bulk material which
is identified by the part num-
ber in the DESCRIPTION
AND USABLE ON CODE
(UOC) column and listed in
the Bulk Material group of the
repair parts list in this RPSTL.
If the item is authorized to you
by the 3d position code of the
SMR code, but the source
code indicates it is made at a
higher level, order the item
from the higher level of main-
tenance,
Items with these codes are not
to be requested/requisitioned
individually. The parts that
make up the assembled item
must be requisitioned or fabri-
cated and assembled at the
level of maintenance indicated
by the source code. If the 3d
position code of the SMR code
authorizes you to replace the
item, but the source code indi-
cates the item is assembled at
a higher level, order the item
from the higher level of main-
tenance.
requisition an
“XA*’-coded
item. Order its next higher assembly. (Also,
refer to the NOTE.)
XB -
If an “XB’* item is not available from sal-
vage, order it using the FSCM and part
number given.
XC -
Installation drawing, diagram, instruction
sheet, field service drawing, that is iden-
tified 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.
(2)
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 main-
tenance.
o -
Unit maintenance or aviation unit category
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:
Code
o -
F -
H -
Application/Explanation
Unit maintenance or Aviation unit is the
lowest level that can do complete repair of
the item.
Direct support or Aviation intermediate is
the lowest level that can do complete
repair of the item.
General support is the lowest level that
can do complete repair of the item.
2
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