PA--Item procured and stocked for anticipated
This manual lists repair parts required for per-
or known usage.
formance of direct support, general support, and
PB- Item procured and stocked for insurance
depot maintenance of the AN/TPX-50.
purpose because essentiality dictates that
a minimum quantity be available in the
PD-Support item, excluding support equipment,
This Repair Parts and Special Tools List is divided
procured for initial issue or outfitting and
into the following sections:
stocked only for subsequent or additional
a. Section II. Repair Parts List. A list of repair
initial issues or outfitting. Not subject to
parts authorized for use in the performance of
maintenance. The list also includes parts which
XA--Item is not procured or stocked because the
must be removed for replacement of the author-
requirement for the item will result in
ized parts. Parts lists are composed of functional
the replacement of the next higher assem-
groups in ascending numerical sequence, with the
parts in each group listed in figure and item num-
XD--A support item that is not stocked. When
required, item will be procured through
normal supply channels.
b. Section III. Special Tools List. Not applicable.
c. Section IV. National Stock Number and Part
Number Index. A list, in ascending numerical se-
Cannibalization or salvage may be used
quence, of all National stock numbers appearing
as a source of supply for any items source
in the listings, followed by a list, in alphanumeric
coded above except those coded XA, XD,
sequence, of all part numbers appearing in the list-
and aircraft support items as restricted
ings. National stock numbers and part numbers
by AR 70042.
are cross-referenced to each illustration figure and
(2) Maintenance code. Maintenance codes are
item number appearance.
assigned to indicate the levels of maintenance
authorized to USE and REPAIR support items.
3. Explanation of Columns
The maintenance codes are entered in the third
The following provides an explanation of columns
and fourth positions of the Uniform SMR Code
found in the tabular listings:
format as follows:
(a) The maintenance code entered in the
a. Illustration. This column is divided as follows:
third position will indicate the lowest maintenance
(1) Figure number. Indicates the figure num-
level authorized to remove, replace, and use the
ber of the illustration on which the item is shown.
support item. The maintenance code entered in
(2) Item number. The number used to iden-
the third position will indicate one of the following
tify item called out in the illustration.
levels of maintenance:
b. Source, Maintenance, and Recoverabitity
O-Support item is removed, replaced, used at the
(1) Source code. Source codes are assigned to
F-Support item is removed, replaced, used at the
support items to indicate the manner of acquiring
direct support level.
support items for maintenance, repair, or overhaul
D-Support items that are removed, replaced,
of end items. Source codes are entered in the first
used at depot, mobile depot, specialized re-
and second positions of the Uniform SMR Code
pair activity only.
format as follows: