Section I. INTRODUCTION

TM 11-4940-238-24P

SECTION I

INTRODUCTION

1. Scope

(1) Source code. Source codes indicate the

manner of acquiring support items for maintenance,

repair, or overhaul of end items. Source codes are

This manual lists spares and repair parts special

entered in the first and second positions of the

tools; special test, measurement, and diagnostic

equipment (TMDE), and other special support equip

Uniform SMR Code format as follows:

ment required for performance of organizational,

Code

Definition

direct support and general support maintenance of

PA - Item procured and stocked for anticipated or

t h e AN/ASM-146A and AN/ASM-147A. It

known usage.

authorises the requisitioning and issue of spares and

PD - Support item, excluding support equipment,

r e p a i r parts as indicated by the source and

procured for initial issue or outfitting and

maintenance codes.

stocked only for subsequent or additional in-

2. General

itial issues or outfittings. Not subject to

automatic replenishment.

XA - Item is not procured or stocked because the re-

This Repair Parts and Special Tools List is divided

quirements for the item will result in there-

into the following sections

placement of the next higher assembly.

a. Section II. Repair Parts List. A list of spares and

XD - A support item that is not stocked. When re-

repair parts authorized for use in the performance of

quired, item will be procured through nor-

maintenance. The list also includes parts which must

mal channels.

be removed for replacement of the authorized parts.

Parts lists are composed of functional groups in

NOTE

numeric sequence, with the parts in each group listed

Cannibalization or salvage maybe used as

in figure and item number sequence.

a source of supply for any items source

coded above except those coded XA and air-

craft support items as restricted by AR

b. Section III. Special Tools List. Not applicable.

700-42.

c. Section IV. National Stock Number and Part

(2) Maintenance code. Maintenance codes are

Number Index. A list, in National item identification

assigned to indicate the levels of maintenance

number (NIIN) sequence, of all National stock

authorized to USE and REPAIR support items. The

numbers (NSN) appearing in the listings, followed by

maintenance codes are entered in the third and fourth

a list, in alphameric sequence, of all part numbers

positions of the Uniform SMR Code format as

appearing in the listings. National stock numbers and

follows:

part numbers are cross-referenced to each illustra-

(a) The maintenance code entered in the third

tion figure and item number appearance.

position will indicate the lowest maintenance level

3. Explanation of Columns

authorized to remove, replace, and use the support

item. The maintenance code entered in the third posi-

tion will indicate one of the following levels of

a. Illustration. This column is divided as follows:

maintenance:

(1) Figure number. Indicates the figure number

of the illustration on which the item is shown.

Application/Expl anation

Code

(2) Item number. The number used to identify

- Support item is removed, replaced, used at the

item called out in the illustration.

organizational level.

b. Source, Maintenance, and Recovera bility (SMR)

- Support item is removed, replaced, used at the

Codes.

direct support level.