Section I. INTRODUCTION

TM 11-4940-246-24P-1

SECTION I

INTRODUCTION

1. Scope

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

quired, item will be procured through normal

This manual lists spares and repair parts; special tools;

supply channels.

special test, measurement, and diagnostic equipment

NOTE

(TMDE), and other special support equipment required

for performance of organizational, direct support, and

Cannibalization or salvage may be used as a

general support maintenance of the AN/ASM-189A. It

source of supply for any items source coded

authorizes the requisitioning and issue of spares and

above except those coded XA and aircraft

repair parts as indicated by the source and maintenance

support items as restricted by AR 700-42.

codes.

(2) Maintenance code. Maintenance codes are as-

signed to indicate the levels of maintenance authorized to

USE and REPAIR support items. The maintenance codes

2. General

are entered in the third and fourth positions of the

This Repair Parts and Special Tools List is divided into the

Uniform SMR Code format as follows:

following sections:

(a) The maintenance code entered in the third

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

position will indicate the lowest maintenance level

repair parts authorized for use in the performance of

authorized to remove, replace, and use the support item.

maintenance. The list also includes parts which must be

The maintenance code entered in the third position will

removed for replacement of the authorized parts. Parts

indicate one of the following levels of maintenance:

lists are composed of functional groups in numeric

Code

Application/Explanation

sequence, with the parts in each group listed in figure and

O - Support item is removed, replaced, used at the

item number sequence.

organizational level.

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

H - Support item is removed, replaced, used at the

c. Section IV. National Stock Number and Part Num-

general support level.

ber Index. A list, in National item identification

(b) The maintenance code entered in the fourth

number (NIIN) sequence, of all National stock numbers

position indicates whether the item is to be repaired

(NSN) appearing in the listings, followed by a list, in

and identifies the lowest maintenance level with the

alphameric sequence, of all part numbers appearing in

capability to perform complete repair (i.e., all author-

the listings. National stock numbers and part numbers are

ized maintenance functions). This position will contain

cross-referenced to each illustration figure and item

one of the following maintenance codes:

number appearance.

Application/Explanation

Code

3. Explanation of Columns

H - The lowest maintenance level capable of com-

plete repair of the support item is the general

a. Illustration. This column is divided as follows:

support level.

(1) Figure number. Indicates the figure number of

Z - Nonreparable. No repair is authorized.

the illustration on which the item is shown.

(3) Recoverability code. Recoverability codes are

(2) Item number. The number used to identify item

assigned to support items to indicate the disposition

called out in the illustration.

action on unserviceable items. The recoverability code is

b. Source, Maintenance, and Recoverability (SMR)

entered in the fifth position of the Uniform SMR Code

Codes.

format as follows:

(1) Source code. Source codes indicate the manner of

Recoverability

acquiring support items for maintenance, repair, or

Definition

Codes

overhaul of end items. Source codes are entered in the

first and second positions of the Uniform SMR Code

Z - Nonreparable item. When unserviceable, con-

format as follows:

demn and dispose at the level indicated in

position 3.

Code

Definition

H - Reparable item. When uneconomically repara-

PA - Item procured and stocked for anticipated or

ble, condemn and dispose at the general sup-

known usage.

port level.