Maintenance code. Maintenance codes are
This manual lists spares and repair parts; special tools;
special test, measurement, and diagnostic equipment
assigned to indicate the levels of maintenance
(TMDE), and other special support equipment required
authorized to USE and REPAIR support items. The
for performance of organizational maintenance of the
maintenance codes are entered in the third and fourth
AN/TPN-1 g. It authorizes the requisitioning and issue of
positions of the Uniform SMR Code format as follows:
spares and repair parts as indicated by the source and
(a) The maintenance code entered in the
third position will indicate the lowest maintenance level
authorized to remove, replace, and use the support item.
The maintenance code entered in the third position will
This Repair Parts and Special Tools List is divided into
indicate one of the following levels of maintenance:
the following sections:
OSupport item is removed, replaced, used at the
repair parts authorized for use in the performance of
maintenance. The list also includes parts which must be
removed for replacement of the authorized parts. Parts
(b) The maintenance code entered in the
lists are composed of functional groups in numeric se-
fourth position indicates whether the item is to be
quence, with the parts in each group listed in figure and
repaired and identifies the lowest maintenance level with
item number sequence.
the capability to perform complete repair (.e., all
b. Section III. Special Tools List. Not applicable.
authorized maintenance functions). This position will
contain one of the following maintenance codes
Number Index. A list, in National item identification
number (NUN) sequence, of all National stock numbers
FThe lowest maintenance level capable of complete
(NSN) appearing in the listings, followed by a list, in
alphameric sequence, of all part numbers appearing in
repair of the support item is the direct support level.
the listings. National stock numbers and part numbers
HThe lowest maintenance level capable of complete
are cross- referenced to each illustration figure and item
repair of the support item is the general support
Explanation of Columns
ZNonreparable. No repair is authorized.
a. Illustration. This column is divided as follows:
(3) Recoverability code. Recoverability codes are
(1) Figure number. Indicates the figure number
assigned to support items to indicate the disposition
of on unserviceable items.
(2) Item number. The number used to identify
The recoverability code is entered
item called out in the illustration.
in the fifth position of the Uniform SMR Code format as
b. Source, Maintenance, and Recoverability (SMR)
(1) Source code. Source codes indicate the
manner of acquiring support items for maintenance,
ZNonreparable item. When unserviceable, condemn
repair, or and dispose at the level indicated in position 3.
and dispose at the level indicated in position 3.
overhaul of end items. Source codes are entered in the
FReparable item. When uneconomically reparable,
first and second positions of the Uniform SMR Code
condemn and dispose at the direct support level.
format as follows:
HReparable item. When uneconomically reparable,
condemn and dispose at the general support level.
PAItem procured and stocked for anticipated or known
National Stock Number. Indicates the National
stock number assigned to the item and will be used for
XDA support item that is not stocked. When required,
item will be procured through normal supply channels.
Part Number. Indicates the primary number
used by the manufacturer (individual, company, firm,
Cannibalization or salvage may be used as a source of
corpora-tion, or Government activity), which controls the
supply for any items source coded above except those
design and characteristics of the item by means of its
coded XA and aircraft sup port items as restricted by AR-
engineering drawings, specifications, standards, and
inspection requirements to identify an item or range of