TM 55-1520-240-23-7
9-60
LIGHTING SYSTEMS
(Continued)
9-60
LANDING LIGHT (SEARCHLIGHT) SYSTEM
Description
The helicopter landing light (searchlight) system includes
two similar controllable lights. They are located on the
underside of the cockpit on either side of the helicopter
centerline at sta. 65. Both light assemblies contain two
motors that extend and rotate the light. The left light is
controlled by the copilot and the right by the pilot.
NO BREAK - WORK HARDER
Separate controls for each light consist of a switch and
a control button on the operator’s thrust control and a
switch on the overhead LIGHTING panel. The overhead
switch arms the motors. The switch on the thrust control
turns the light on and off. The control button extends,
rotates, and retracts the light.
NO BREAK - WORK HARDER
On helicopters with 17 , the left searchlight has a
150 watt lamp and a filter that provides infra-red
lighting that is invisible to the naked eye. It is used for
missions calling for night vision goggles (NVG). The
right searchlight has a conventional 450 watt lamp. It is
used during non-NVG missions.
NO BREAK - WORK HARDER
Power to operate each light comes from the No. 1 (left
light) or No. 2 (right light) 28 vdc bus.
9-172
