b. Source, Maintenance, and Recoverability
This manual lists spares and repair parts; special
(1) Source code. Source codes indicate the
tools; special test, measurement, and diagnostic
manner of acquiring support items for mainte-
equipment (TMDE), and other special support
nance, repair, or overhaul of end items. Source
equipment required for performance of direct
codes are entered in the first and second positions
support and general support maintenance of the
of the Uniform SMR Code format as follows:
CV-425/U. It authorizes the requisitioning and
issue of spares and repair parts as indicated by
the source and maintenance codes.
PA -- Item procured and stocked for anticipated
or known usage.
XD -- A support item that is not stocked. When
This Repair Parts and Special Tools List is di-
required, item will be procured through
vided into the following sections:
normal supply channels.
a. Section II. Repair Parts List. A list of spares
and repair parts authorized for use in the per-
formance of maintenance. The list also includes
Cannibalization or salvage may be used
parts which must be removed for replacement of
as a source of supply for any items
the authorized parts. Parts lists are composed of
source coded above except those coded
functional groups in numeric sequence, with the
XA and aircraft support items as re-
parts in each group listed in figure and item num-
stricted by AR 70042.
(2) Maintenance code. Maintenance codes
b. Section III. Special Tools List. Not applicable.
are assigned to indicate the levels of maintenance
c. Section IV. National Stock Number and Part
authorized to USE and REPAIR support items.
Number Index. A list, in National item identifica-
The maintenance codes are entered in the third
tion number (NIIN) sequence, of all National
and fourth positions of the Uniform SMR Code
stock numbers (NSN) appearing in the listings,
format as follows:
followed by a list, in alphameric sequence, of all
(a) The maintenance code entered in the
part numbers appearing in the listings. National
third position will indicate the lowest mainte-
stock numbers and part numbers are cross-refer-
nance level authorized to remove, replace, and use
enced to each illustration figure and item number
the support item. The maintenance code entered
in the third position will indicate one of the
following levels of maintenance:
3. Explanation of Columns
a. Illustration. This column is divided as fol-
O -- Support item is removed, replaced, used at
the organizational level.
(1) Figure number. Indicates the figure
F -- Support item is removed, replaced, used at the
number of the illustration on which the item is
direct support level.
(b) The maintenance code entered in the
(2) Item number. The number used to iden-
fourth position indicates whether the item is to
tify item called out in the illustration.