TM 55-1520-240-T
9-14.10 COCKPIT DOME AND UTILITY LIGHTS OPERATIONAL CHECK
9-14.10
INITIAL SETUP
Applicable Configurations:
Tools:
References:
TM 55-1520-240-23
Equipment Condition:
TM 55-1520-240-23:
Battery Connected
Electrical Power On
Materials:
Hydraulic Power Off
None
Cockpit Dome Utility Lights Visual Check Per-
Personnel Required:
formed (Task 9-14.9)
Aircraft Electrician
TASK
RESULT
1.
2.
3.
4.
5.
6.
7.
8.
Check that LIGHTING COCKPIT DOME cir-
cuit breaker (1) is closed.
Set DOME switch (2) to WHT.
Turn DOME switch (2) to OFF.
Set DOME switch (2) to NVG.
Set DOME switch (2) to OFF.
Remove pilot’s utility light from overhead
panel bracket. Press and release switch (4).
Turn dimming control (5) through its
range.
Stow pilot’s utility light.
Perform steps 6 and 7 with copilot’s utility Iight.
If COCKPIT DOME circuit breaker (1) is open, close
it. If it opens again, go to task 9-14.11.
White light in both dome lights shall come on. If any
dome light is not lit, go to task 9-14.12.
Dome lights shall go out.
Blue light in both dome lights shall come on. If any
dome light is not lit, go to task 9-14.13.
Dome lights shall go out.
Utility light shall blink when switch (4) is pressed and
released. Utility light shall increase in brightness as
dimming control (5) is turned. If utility light does not
come on, go to task 9-14.14. If light comes on but
does not increase in brightness, replace utility light.
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23:
Battery Disconnected
Electrical Power Off
END OF TASK
Change 2
9-258.3
