TM10-5411-200-24P
TO35E4-177-4
CODE
AD
XA
XB
XC
XD
DEFINITION
Item to be assembled at depot maintenance
levels.
Item is not procured or stocked because the
requirements for the item will result in the
replacement of the next higher assembly.
Item is not procured or stocked. If not avail-
able through salvage, requisition.
Installation drawing, diagram, instruction
sheet, field service drawing that is identified
by manufacturers’ part number.
A support item that is not stocked. When
required, item will be procured through
normal supply channels.
(*) NOTE: For USAF and the USA Safeguard Pro-
gram only Code “F” will be used to denote intermedi-
ate maintenance On joint programs use of either code
For H by the joining service will denote intermediate
maintenance to USAF and USA Safeguard Program.
(2) Uniform Maintenance Code applicable to all
Military Services: GENERAL; Maintenance Codes
are assigned to indicate the levels of maintenance
authorized to USE and REPAIR support items. The
Maintenance Codes are in the third and fourth posi-
tion of the Uniform SMR Code Format.
(a) USE (THIRD POSITION): The Main-
tenance Code entered in the third position indicates
the lowest level maintenance level authorized to
remove, replace and use the support item. The Main-
tenance Code entered in the third position indicates
one of the following levels of maintenance.
Code
O
F
G
H
D
(b)
Application/Explanation
Support item is removed, replaced, used at
the organizational level of maintenance.
Support item is removed, replaced, used at
the following intermediate levels:
USAF–Intermediate (*)
USA–Direct Support (*)
USN–Afloat
USMC–Third Echelon
Support item is removed, replaced, used at
both afloat and ashore intermediate levels:
Navy only.
Support item is removed, replaced, used at
the following intermediate levels:
USAF–Intermediate (*)
USA–General Support (*)
USN–Ashore (Only)
USMC–Fourth Echelon
Support items that are removed, replaced,
used at Depot only:
USAF–Depot, Mobile Depot and Special-
ized Repair Activity
USA–Depot, Mobile Depot and Specialized
Repair Activity
USN–Aviation Rework, Avionics and
Ordinance Facilities and Shipyard.
USMC–Depot
REPAIR (FOURTH POSITION): The main-
tenance code entered in the fourth position indicates
whether the item is to be repaired and identifies the
lowest maintenance level with the capability to per
form complete repair (i.e. all authorized maintenance
functions).
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