TM 55-1520-240-T
9-10.3 COPILOT’S FLIGHT INSTRUMENT PANEL LIGHTS OPERATIONAL CHECK
9-10.3
INITIAL SETUP
References:
Applicable Configurations:
TM 55-1520-240-23
Without 17 or 74
Equipment Condition:
Tools:
TM 55-1520-240-23:
None
Battery Connected
Materials:
Electrical Power On
None
Hydraulic Power Off
Personnel Required:
Copilots Flight Instrument Panel Lights, Visual
Aircraft Electrician
Check Performed (Task 9-10.2)
TASK
RESULT
1.
Check that LIGHTING COPLT INSTR circuit breaker
If COPLT INSTR circuit breaker (1) is open, close it. If it
(1) is closed.
opens again, go to task 9-10.4.
2.
Turn CO-PILOT FLT INST LTS control (2) from OFF
Following lights shall come on and increase in brightness
through DIM to BRT.
as control (2) is rotated to BRT:
a. Panel lights (3)
b. Internal lights in five indicators (4).
c. Panel lights and switch captions VOR, DOP, FM, and
CMD on HSI MODE SELECT panel (5).
If any light is not lit, go to task 9-10.5. If lights do not
increase in brightness, replace CO-PILOT FLT INST LTS
control.
3.
Turn CO-PILOT FLT INST LTS control (2) to OFF.
All copilot's instrument panel lights shall go out If not,
replace CO-PILOT FLT INST LTS control (2).
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23:
Electrical power off.
Battery disconnected.
END OF TASK
9-190 Change 19
