(1) Source code. Source codes indicate the
manner of acquiring support items for mainte-
This manual lists spares and repair parts; special
nance, repair, or overhaul of end items. Source
tools; special test, measurement, and diagnostic
codes are entered in the first and second positions
equipment (TMDE), and other special support
of the Uniform SMR Code format as follows:
equipment required for performance of organi-
zational, direct support and general support
PA Item procured and stocked for anticipated
maintenance of the AN/USM-432. It authorizes
or known usage.
the requisitioning and issue of spares and repair
XD A support item that is not stocked. When
parts as indicated by the source and maintenance
required, item will be procured through
normal supply channels.
Cannibalization or salvage may be used
This Repair Parts and Special Tools List is divided
as a source of supply for any items source
into the following sections:
coded above except those coded XA and
aircraft support items as restricted by
and repair parts authorized for use in the per-
formance of maintenance. The list also includes
(2) Maintenance code. Maintenance codes are
parts which must be removed for replacement of
assigned to indicate the levels of maintenane
the authorized parts. Parts lists are composed of
authorized to USE and REPAIR support items.
functional groups in numeric sequence, with the
The maintenance codes are entered in the third
parts in each group listed in figure and item num-
and fourth positions of the Uniform SMR Code
format as follows:
(a) The maintenance code entered in the
b. Section III. Special Tools List. Not applicable.
third position will indicate the lowest maintenance
level authorized to remove, replace, and use the
Number Index. A list in National item identifica-
support item. The maintenance code entered in the
tion number (NIIN) sequence of all National
third position will indicate one of the following
stock numbers (NSN) appearing in the listings,
levels of maintenance:
followed by a list, in alphameric sequence, of all
part numbers appearing in the listings. National
O Support item is removed, replaced, used at the
stock numbers and part numbers are cross-refer-
enced to each illustration figure and item number
H Support item is removed, replaced, used at
the general support level.
D Support items that are removed, replaced,
3. Explanation of Columns
used at depot, mobile depot, specialized re-
a. Illustration. This column is divided as fol-
pair activity only.
(b) The maintenance code entered in the
(1) Figure number. Indicates the figure num-
fourth position indicates whether the item is to
ber of the illustration on which the item is shown.
be repaired and identifies the lowest maintenance
(2) Item number. The number used to iden-
level with the capability to perform complete
tify item called out in the illustration.
repair (i.e., all authorized maintenance fUnCtiOns).
This position will contain one of the following
b. Source, Mainntenance, and Recoverability