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2-13-5. Anticollision Lights.
Two red strobe anticollision lights are on the helicopter (3
and 7, fig. 2-13-1). One is on top of the aft pylon and the
other is on the fuselage underside. Power to operate the
anticollision lights is supplied by the No. 2 DC bus
through the LIGHTING ANTI COL TOP and BOT circuit
breakers on the No. 2 PDP.
2-13-6. ANTI COL Light Switches.
Two ANTI COL TOP and BOT toggle switches are on the
EXT LTG panel on the left side of the overhead switch
panel (fig. 2-1-10). Each two-position switch is labeled
OFF and ON. When the anticollision light switch is ON,
the lights are energized. When the switch is placed to
OFF, the anticollision lights are deenergized.
Two controllable searchlights are mounted on the bottom of
the fuselage (8, fig. 2-13-1). One is controlled from the pilot
THRUST CONT lever and the other from the copilot
THRUST CONT lever. One seachlight, either pilot or copilot
is equipped with an infrared (IR) filter for NVG operations.
Each light is operated independently by a SRCHLT
CONTR switch, SLT-FIL (searchlight filament), and position
switch. They may be extended and stopped at any
angle up to 90
in a vertical plane and rotated 360
about
its vertical axis as long as the searchlight position switch
is displaced.
2-13-7. SRCHLT CONTR Switch.
Two SRCHLT CONTR (searchlight control) switches are
on the overhead switch panel (fig. 2-13-2). The PLT
SRCHLT CONTR switch is on the PLT LTG panel. The
CPLT SRCHLT CONTR switch is on the CPLT LTG panel.
each two-position switch is labeled RET and ON.
When the SRCHLT CONTR switch is placed to ON, the
STL-FIL switch on the THRUST CONTR lever becomes
operational. If the searchlight is at any angle off center
when the SRCHLT CONTR switch is placed to RET, the
searchlight will automatically rotate to point forward and
then will retract flush with the fuselage. Power is supplied
by the No. 1 and No. 2 DC bus through the LIGHTING SLT
CONT circuit breakers on the No.1 and No. 2 PDP.
2-13-8. SLT-FIL Switch.
CAUTION
The IR searchlight emits invisible infrared
rays which may be hazardous to personnel
looking directly at the light at close
range or touching it. Ensure that the IR
SLT-FIL switch is OFF and the light fully
retracted when it is not in use.
A SLT-FIL (searchlight filament) switch is located on the pilot
and copilot THRUST CONT lever switch bracket (fig. 2-5-1.)
Each switch is labeled ON and OFF. The switches turn on
the landing-searchlight lamp, before or after extension. Power
to operate the landing searchlight lamp is supplied by the
No. 1 and No. 2 DC bus through the LIGHTING SLT FIL
circuit breakers on the No. 1 and No. 2 PDP.
2-13-9. SEARCH LIGHT Position Switch.
CAUTION
Do not confuse the SEARCH LIGHT position
switch with the two engines beep trim
switches.
A five-position momentary SEARCH LIGHT switch is on
each THRUST CONTR. lever switch bracket (fig. 2-5-1). It
is labeled L (left), EXTEND, R (right), and RETRACT. The
switch is spring-loaded to center off position.
When the SRCHLT CONTR and SLT-FIL switches are ON,
the searchlight can be controlled up and down or left and
right with the SEARCH LIGHT position switch. Power to
operate the searchlight position switch is supplied by the No.
1 and No. 2 DC bus through the LIGHTING SLT CONT
circuit breaker on the No. 1 and No. 2 PDP.
TM 1-1520-240-10
2-13-3
2-13-10. Overhead Switch Panel Lights.
The overhead switch panel has integral lighting. Power to
operate and control the overhead panel lights is supplied by
the No. 1 AC bus through the LIGHTING OVHD PNL
circuit breaker on the No. 1 PDP.
2-13-11. OVHD CSL Switch.
The OVHD CSL (overhead console) switch is located on
tehe CPLT LTG panel on the left side of the overhead
switch (fig. 2-13-2). The rotary control switch is labeled
OFF, DIM, and BRT. It adjusts the light level from DIM to
BRT. When the rotary control switch is OFF, the overhead
switch panel light system is deenergized.
2-13-12. Pilot and Copilot Instrument Panel Lights.
All flight instruments and placards on both pilot and copilot
instrument panels receive lighting. The HSI, attitude
indicator (VGI), radar altimeter, and turn and slip indicator
for both pilot and copilot have integral lighting. The
remaining instruments are externally lit by lighting posts
adjacent to the instruments. Power to operate and control
the pilot flight instrument lights is supplied by the No.
2 AC bus through the LIGHTING PILOT INSTR circuit
breaker on the No. 2 PDP. Power to operate and control
　
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