TM 55-1520-240-T
9-10.8 COPILOT’S FLIGHT INSTRUMENT PANEL LIGHTS OPERATIONAL CHECK
9-10.8
INITIAL SETUP
References:
Applicable Configurations:
TM 55-1520-240-23
With 17 and 69
Equipment Condition:
Tools:
TM 55-1520-240-23:
None
Battery Connected
Materials:
Electrical Power On
None
Hydraulic Power Off
Personnel Required:
Copilot Flight Instrument Panel Lights Visual
Check
Aircraft Electrician
Performed (Task 9-10.2)
TASK
RESULT
1.
Check that LIGHTING COPLT INST circuit breaker (1)
If COPLT INST circuit breaker (1) is open, close it. If it
is closed.
opens again, go to task 9-10.9.
2.
Turn CPLT INST light control (2) from OFF through
Following lights shall come on and increase in brightness
DIM to BRT.
as control (2) is rotated to BRT:
a. Panel lights (3).
b. Internal lights in 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 9-10.10. If light brightness
does not increase, replace CPLT INST lights control.
3.
Turn CPLT INST lights control (2) to OFF.
All copilot's flight instrument panel lights shall go out. If
not, replace CPLT INST light control (2).
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23:
Battery Disconnected
Electrical Power Off
END OF TASK
9-198.2 Change 19
