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.
The maintenance duties a s s i g n e d t o t h e
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
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
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
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
the dots on the ID-48A/ARN.
b. Insure that the bezel is clean and unbroken.
c. Insure that the marker beacon lamp is