TM 55-1520-240-23-7
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TEST AND ADJUST LANDING LIGHT
9-78
INITIAL SETUP
Applicable Configurations:
All
Tools:
Electrical Repairers Tool Kit, NSN 5180-00-323-4915
Power Switch, Two-Position
Control Switch, Five-Position
Terminal Board, Eight Terminal
DC Power Supply, 25 Ampere
Materials:
None
Personnel Required:
Aircraft Electrician (2)
Inspector
Equipment Condition:
Off Helicopter Task
Test Setup
General Safety Instructions:
Do not look into lighted NVG landing
light. Infra-red light output can
seriously injure eyes.
1.
Connect test setup (1) to landing light (2).
2.
Turn on power supply (3). Adjust power supply
output to 28 vdc.
3.
Set power switch (4) to on. Check lamp (5).
Lamp shall come on. Check visually without 17 .
Check for heat output with 17 .
4.
Set power switch (4) to off. Check lamp (5).
Lamp shall go off. Check visually without 17 .
Check for heat output with 17 .
5.
Set control switch (6) to EXTEND. Check light
(2). Light shall fully extend and stop.
6.
Measure length of spring (7). Record length.
7.
Set control switch (6) to RETRACT. Check light
(2). Light shall fully retract and stop.
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