TM 3-4310-100-20 & P
Code
Definition
maintenance functions). This position will contain one of
the following maintenance codes.
KB--Item included in both a depot overhaul/repair kit
and a maintenance kit.
Code
Application/Explanation
MO--Item to be manufactured or fabricated at
O--The lowest maintenance level capable of complete
organizational level.
repair of the support item is the organizational level.
MF--Item to be manufactured or fabricated at the direct
(3) Recoverability Code.
Recoverability
support maintenance level.
MH Item to be manufactured or fabricated at the general
codes and assigned to support items to indicate the
support maintenance level.
disposition action on unserviceable items.
The
MD--Item to be manufactured or fabricated at the depot
recoverability code is entered in the fifth position of the
maintenance level.
Uniform SMR Code format as follows:
Recoverability
AO--Item to be assembled at organizational level.
AF--Item to be assembled at Direct Support level.
Codes
Definition
AH--Item to be assembled at general support
Z--Nonreparable item. When unserviceable, condemn
maintenance level.
and dispose at the level indicated in position 3.
AD--Item to be assembled at depot maintenance level.
c. National Stock Number.
Indicates the
XA--Item is not procured or stocked because the
National stock number assigned to the item and which
requirements for the item will result in the
will be used for requisitioning.
replacement on the next higher assembly.
d. Part Number. Indicates the primary number
XB--Item is not procured or stocked. If not available
used by the manufacturer (individual, company, firm.
through salvage requisition.
corporation, or Government activity), which controls the
XC--Installation drawing, diagram, instruction sheet.
design and characteristics of the item by means of its
field service drawing, that is identified by
engineering drawings, specifications, standards, and
manufacturer's part number.
inspection requirements to identify an item or range of
XD--A support item is not stocked. When required,
items.
item will be procured through normal supply
NOTE
channels.
When a stock numbered item is
requisitioned, the item received may
NOTE
have a different part number than the
Cannibalization or salvage may be
part being replaced.
used as a source of supply for any
items coded above except those
e. Federal Supply Code for Manufacturer
coded XA and aircraft support items
(FSCM). The FSCM is a 5-digit numeric code listed in
as restricted by AR 700-42.
SB 708-42 which is used to identify the manufacturer.
(2) Maintenance Code. Maintenance codes
distributor, or Government agency.
are assigned to indicate the levels of maintenance
f.
Description. Indicates the Federal item name
authorized to USE and REPAIR support items.
and if required, a minimum description to identify -the
The maintenance codes are entered in the third and
item.
fourth positions of the Uniform SMR Code format as
g. Unit of Measure (U/M). Indicates the standard
follows:
of the basic quantity of the listed item as used in
(a) The maintenance code entered in the third
performing the actual maintenance function.
This
position will indicate the lowest maintenance level
measure is expressed by a two-character alphabetical
authorized to remove, replace, and use the support item.
abbreviation (e.g., ea., in, pr. etc.). When the unit of
The maintenance code entered in the third position will
measure differs from the unit of issue, the lowest unit of
indicate one of the following levels of maintenance:
issue that will satisfy the required units of measure will
Code
Application/Explanation
be requisitioned.
C-- Crew or operator maintenance performed within
h. Quantity Incorporated in Unit. Indicates the
organizational maintenance.
quantity of the item used in the breakout shown on the
O-- Support item is removed, replaced, used at the
illustration figure, which is prepared for a functional
organizational level.
group, subfunctional group,-or an assembly.
b. The maintenance code entered in the fourth
position indicates whether the item is to be repaired and
C-4. Special Information
identifies the lowest maintenance level with the capability
a. Usable on codes are shown in the description
to perform complete repair (i.e., all
authorized
C-2
