CHAPTER 1 INTRODUCTION - TM-11-5840-270-24-10005

TM 11-5840-270-24-1

CHAPTER 1

INTRODUCTION

Section I. GENERAL

Deficiencies. Fill out and forward DD Form 6

1-1. Scope

(Report of Packaging and Handling Deficiencies)

This manual contains information for the main-

as prescribed in AR 700-58 (Army)/NAVSUP

tenance of the Indicator ID-48A/ARN. Included

Publication 378 (Navy/AFR 71-4 (Air Force)/

are instructions for the overhaul and repair,

and MCO P4630.29 (Marine corps).

calibration and test procedures to be used in the

c. Discrepancy in Shipment Report (DISREP)

performance of organization, direct and general

(SF361). Fill out and forward Discrepancy in

support maintenance.

S h i p m e n t R e p o r t (DISREP)

(SF361)

1-2. Index of Publications

prescribed in AR 55-38 (Army)/NAVSUP Pub

a. DA Pam 310-4. Refer to DA Pam 310-4 to

4 5 9 (NAVY)/AFM 75-34 (Air Force)/ and

determine whether there are new editions, changes,

MCO P4610.19 (Marine Corps).

or additional publications p e r t a i n i n g to the

d. Reporting o f E q u i p m e n t P u b l i c a t i o n

equipment.

Improvements. The reporting of errors, omissions,

b. DA Pam 310-7. Refer to DA Pam 310-7 to

a n d recommendations f o r i m p r o v i n g t h i s

determine whether there are modification work

publication by the individual user is encouraged.

orders (MWO'S) pertaining to the equipment.

Reports should be submitted on DA Form 2028

(Recommended Changes to Publications) and

1-3. Forms and Records

forwarded direct to Commanding General, U. S.

a. Reports of Maintenance and Unsatisfactory

Army Electronics Command, ATTN: AMSEL-

Equipment. Use equipment forms and records in

ME-NMP-AN, Fort Monmouth, N.J. 07703.

accordance with instructions in TM 38-750.

b. R e p o r t o f P a c k a g i n g a n d H a n d l i n g

Section Il. DESCRIPTION AND DATA

instrument approach receivers to provide a visual

1-4. Purpose and Use

indication of the position of the aircraft with respect

a. Purpose. The Instrument Approach System

to radio-frequency space patterns generated by the

provides the pilot with a straight line glide path

ground transmitter equipment of the instrument

beam and a runway localizer beam. To enable the

approach systems. The Indicator two main in-

pilot to follow the two beams, the aircraft is

dicating pointers, localizer and glide path pointers,

e q u i p p e d with an ID-48/ARN Indicator. The

establish the position of the runway localizer and

Indicator operates from the output of the aircraft

the glide path beams with respect to the image of

localizer and glide path receivers. The marker

the airplane printed at the center of the dial of the

beacon lamp on the Indicator is operated from a

instrument.

separate marker beacon receiver.

b. Use. The Indicator is used in conjunction with

1-1