This manual lists spares and repair parts; special tools;
(2) Maintenance code Maintenance codes are
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/AKT-18B 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
This Repair Parts and Special Tools List is divided into
position will indicate one of the following levels of
the following sections:
and repair parts authorized for use in the performance of
O - Support item is removed, replaced, used at the
maintenance. The list also includes parts which must be
removed for replacement of the authorized parts. Parts
(b) The maintenance code entered in
lists are composed of functional groups in numeric
the fourth position indicates whether the item is to be
sequence, with the parts in each group listed in figure
repaired and identifies the lowest maintenance level
and item number sequence.
with the capability to perform complete repair (i.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 (NIIN) sequence, of all National stock numbers
F - The lowest maintenance level capable of
(NSN) appearing in the listings, followed by a list, in
complete repair of the support Item is the direct
alphameric sequence, of all part numbers appearing in
the listings. National stock numbers and part numbers
D - The lowest maintenance level capable of
are cross-referenced to each illustration figure and item
complete repair of the support item is the depot
Z - Non reparable. No repair is authorized.
(3) Recoverability code.
3. Explanation of Columns
codes are assigned to support items to indicate the
a. Illustration. This column is divided as follows:
disposition action on unserviceable items.
(1) Figure number.
Indicates the figure
recoverability code is entered in the fifth position of the
number of the illustration on which the Item is shown.
Uniform SMR Code format as follows:
(2) Item number.
The number used to
identify item called out in the illustration.
b. Source, Maintenance, and Recoverability (SMR)
Z - Nonreparable item When unserviceable, condemn
and dispose at the level indicated in position 3.
(1) Source code. Source codes indicate the
manner of acquiring support items for maintenance,
Reparable item. When beyond lower level repair
repair, or overhaul of end items. Source codes are
capability, return to depot. Condemnation and
entered in the first and second positions of the Uniform
disposal not authorized below depot level.
SMR code format as follows:
c. National Stock Number. Indicates the National
stock number assigned to the item and will be used for
PA - Item procured and stocked for anticipated or
d. Part Number. Indicates the primary number
PD - Support item, excluding support equipment,
used by the manufacturer (individual, company, firm,
procured for initial Issue or outfitting and stocked
corporation, or Government activity), which controls the
only for subsequent or additional initial Issues or