CHAPTER 2 ORGANIZATIONAL MAINTENANCE INSTRUCTIONS

TM 11-5840-270-24-1

CHAPTER 2

ORGANIZATIONAL M A I N T E N A N C E I N S T R U C T I O N S

d. Check zero adjust of pointers.

2-1. Scope

The maintenance duties a s s i g n e d t o t h e

2-4. Cleaning

organizational repairman of the ID-48A/ARN

Clean exterior of dust, using damp cloth. Dry with

are limited preventive maintenance and

lint-free cloth. Clean window with lint-free cloth.

replacement of the beacon lamp and lens.

Brush pins of connectors to remove dust or foreign

matter.

2-2. Organizational Preventive Maintenance

Preventive maintenance is the systematic care,

2-5. Organizational Troubleshooting

servicing, and inspection of equipment to prevent

Press the PRESS-TO-TEST switch (fig. 1-1). If the

occurrence of trouble, to reduce repair time, and to

beacon lamp does not light, replace it (para 2-6).

i n s u r e equipment serviceable under normal

2-6. Replacing Beacon Lamp

operating conditions.

a. Unscrew the dimmer ring and lens assembly.

2-3. Organizational Preventive Maintenance

b. Remove the bayonet base lamp and replace it.

Checks and Services

c. Replace the dimmer ring and lens assembly.

Before and after each operating period and prior to

2-7. Zero adjust of pointers

storage, visually inspect the ID-48A/ARN as

follows:

To adjust the Localizer or Glide path pointers turn

a. Insure that all parts and components are

the zero adjust screws on the window to align with

secure.

the dots on the ID-48A/ARN.

b. Insure that the bezel is clean and unbroken.

c. Insure that the marker beacon lamp is

operating.

2-1