Section I. INTRODUCTION - TM-9-4931-477-34P0002

TM 9-4931-477-34P

Section I. INTRODUCTION

1. Scope

This manual lists repair parts that are required for maintenance of Irradiance Set, Infrared Industries Model 921 and is

applicable to Army Area Calibration Laboratories (AACL's).

NOTE

Throughout this manual, DS is used to indicate AACT, and GS is used to indicate

AACL.

2. General

This manual is divided as follows:

a. Section I. Introduction.

b. Section II. Repair Parts List. A list, in alphabetical sequence, of repair parts authorized for the performance of

maintenance at the AACT and AACL support levels.

c. Section III. National Stock Number and Reference Number Index. A list in ascending numerical sequence, of all

National stock numbers (NSN's) appearing in the repair parts list, followed by a list of all reference numbers in alpha-

numeric sequence appearing in the list. The NSN's and reference numbers are cross-referenced to a figure number and

item number in column 1.

NOTE

The figure and item number columns represent cross-reference numbers, since

illustrations are not included in this manual.

3. Explanation of Columns

Refer to section I of TM 9-4931-700-34P for explanation of columns (para 3), special information (para 4, except for

subparagraph 4o which is not applicable to this manual), and abbreviations (para 6).

4. How to Locate Repair Parts

When NSN or reference number is unknown, use the repair parts listing and locate the item by description. When

National stock number or reference number is known, use the list of NSN's or the reference numbers and locate the

cross-referenced figure and item number under column 1 of the repair parts list for the complete description of the repair

part.

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