SECTION I. INTRODUCTION - TM-11-5820-518-20P0005

TM 11-5820-518-20P

SECTION I

INTRODUCTION

(2) Maintenance code. Maintenance codes are

1. Scope

assigned to indicate the levels of maintenance authorized

This manual lists spares and repair parts; special tools;

to USE and REPAIR support items. The maintenance

special test, measurement, and diagnostic equipment

codes are entered in the third and fourth positions of the

(TMDE), and other special support equipment required

Uniform SMR Code format as follows:

for performance of organizational maintenance of the

(a) The maintenance code entered in the third

AN/ARC-51X and AN/ARC-51BX. It authorizes the

position will indicate the lowest maintenance level

requisitioning and issue of spares and repair parts as in-

authorized to remove, replace, and use the support

dicated by the source and maintenance codes.

item. The maintenance code entered in the third posi-

tion will indicate one of the following levels of

2. General

maintenance:

This Repair Parts and Special Tools List is divided into

Code

Application/Explanation

the following sections:

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

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

organizational level.

repair parts authorized for use in the performance of

(b) The maintenance code entered in the fourth

maintenance. The list also includes parts which must be

position indicates whether the item is to be repaired and

removed for replacement of the authorized parts. Parts

identifies the lowest maintenance level with the capability

lists are composed of functional groups in numeric se-

to perform complete repair (i. e., all authorized mainte-

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

nance functions). This position will contain one of the

item number sequence.

following maintenance codes:

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

c. Section IV. National Stock Number and Part

Code

Application/Explanation

Number Index. A list, in National item identification

F -- The lowest maintenance level capable of complete

number (NIIN) sequence, of all National stock numbers

repair of the support item is the direct sup-

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

port level.

alphanumeric sequence, of all part numbers appearing in

H -- The lowest maintenance level capable of complete

the listings. National stock numbers and part numbers

repair of the support item is the general sup-

are cross-referenced to each illustration figure and item

port level.

number appearance.

Z -- Nonreparable. No repair is authorized.

(3) Recoverability code. Recoverability codes are

3. Explanation of Columns

assigned to support items to indicate the disposition ac-

a. Illustration. This column is divided as follows:

tion on unserviceable items. The recoverability code is

(1) Figure number. Indicates the figure number the

entered in the fifth position of the Uniform SMR Code

illustration on which the item is shown.

format as follows:

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

Recoverability

called out in the illustration.

codes

Definition

b. Source, Maintenance, and Recoverability (SMR)

Z -- Nonreparable item. When unserviceable, condemn

Codes.

and dispose at the level indicated in position 3.

(1) Source code. Source codes indicate the manner

F -- Reparable item. When uneconomically reparable,

of acquiring support items for maintenance, repair, or

condemn and dispose at the direct support level.

overhaul of end items. Source codes are entered in the

D -- Reparable item. When beyond lower level repair

first and second positions of the Uniform SMR Code

capability, return to depot. Condemnation and

format as follows:

disposal not authorized below depot level.

c. National Stock Number. Indicates the National

Code

Definition

stock number assigned to the item and will be used for

PA -- Item procured and stocked for anticipated or

requisitioning purposes.

known usage.

d. Part Number. Indicates the primary number used

NOTE

by the manufacturer (individual, company, firm, cor-

Cannibalization or salvage may be used as a

poration, or Government activity), which controls the

source of supply for any items source coded

design and characteristics of the item by means of its

above except those coded XA and aircraft

engineering drawings, specifications, standards, and in-

support items as restricted by AR 700-42.