TM10-4320-31 6-24P
3. EXPLANATION OF COLUMNS (Sections II and III).
a. Item No. (Column (1)). Indicates the number used to identify items called out in the illustration.
b. SMR Code (Column (2)). The Source, Maintenance, and Recoverability (SMR) code is a 5-position code
containing supply and requisitioning information, maintenance category authorization criteria, and disposition instruction,
as shown in the following breakout:
How you get an
Who can install,
Who can do
Who determines
item.
replace or use
complete
disposition action
the item.
repairs on
on an
the item
unserviceable
item.
*Complete Repair: Maintenance capacity, capability, and authority to perform all corrective
maintenance tasks of the "Repair" function in a use/user environment in order to restore serviceability to
a failed item.
(1) Source Code. The source code tells you how to get an item needed for maintenance, repair, or overhaul of
an end item or equipment. Explanations of source codes follows:
Code
Explanation
PA
PB
Stocked Items; use the applicable NSN to request/requisition
PC**
items with these source codes. They are authorized to the
PD
category indicated by the code entered in the 3rd position of the
PE
SMR code.
PF
** NOTE: Items coded PC are subject to deterioration.
PG
KD
Items with these codes are not to be requested/requisitioned
KF
individually. They are part of a kit which is authorized to the
KB
maintenance category indicated in the 3rd position of the SMR
code. The complete kit must be requisitioned and applied.
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