SECTION I
INTRODUCTION
NOTE
1. Scope
This manual lists repair parts and special tools re-
Cannibalization or salvage may be used as a
quired for performance of organizational/maintenance
source of supply for any items source coded
of the AN/URM157 and AN/URM157A.
above except those coded XA, XD, and air-
craft support items as restricted by AR
2. General
700-42.
This Repair Parts and Special Tools List is divided
(2) Maintenance code. Maintenance codes are as-
into the following sections:
signed to indicate the levels of maintenance authorized
a. Section II. Repair Parts List. A list of repair
to USE and REPAIR support items. The maintenance
parts authorized for use in the performance of mainte-
codes are entered in the third and fourth positions of
nance. The list also includes parts which must be re-
the Uniform SMR Code format as follows:
moved for replacement of the authorized parts. Parts
(a) The maintenance code entered in the third
lists are composed of functional groups in ascending
position will indicate the lowest maintenance level au-
numerical sequence, with the parts in each group
thorized to remove, replace, and use the support item.
listed in figure and item number sequence.
The maintenance code entered in the third position
b. Section III. Special Tools List. Not applicable.
will indicate one of the following levels of maintenance:
c. Section IV. National Stock Number and Part
Number Index. A list, in ascending National item
Application/Explantion
Code
identification number (NIIN, last 9 digits) sequence,
O--Support item is removed, replaced, used at the
of all National stock numbers appearing in the listings,
followed by a list, in alphanumeric sequence, of all part
(b) The maintenance code entered in the fourth
numbers appearing in the listings. National stock
position indicates whether the item is to be repaired
number and part numbers are cross-referenced to
and identifies the lowest maintenance level with the
each illustration figure and item number appearance.
capability to perform complete repair (i.e., all au-
thorized maintenance functions). This position will
3. Explanation of Columns
contain one of the following maintenance codes:
The following provides an explanation of columns
found in the tabular listings:
Application/Explanation
Code
a. Illustration. This column is divided as follows:
H--The lowest maintenance level capable of complete
(1) Figure number. Indicates the figure number
repair of the support item is the general support
of the illustration in which the item is shown.
level.
(2) Item number. The number used to identify
Z--Nonreparable. No repair is authorized.
each item called out in the illustration.
(3) Recoverability code. Recoverability codes are
b. Source, Maintenance, and Recoverability Codes
assigned to support items to indicate the disposition
(SMR).
action on unserviceable items. The recoverability code
(1) Source code. Source codes are assigned to
is entered in the fifth position of the Uniform SMR
support items to indicate the manner of acquiring sup-
Code format as follows:
port items for maintenance, repair, or overhaul of end
items. Source codes are entered in the first and second
Recoverability
positions of the Uniform SMR Code format as follows:
Definition
codes
Z--Nonreparable item. When unserviceable, con-
Code
Definition
demn and dispose at the level indicated in posi-
PA--Item procured and stocked for anticipated or
tion 3.
known usage.
H--Reparable item. When uneconomically reparable,
XD--A support item that is not stocked. When re-
condemn and dispose at the general support
quired, item will be procured through normal
level.
supply channels.
