TM 55-1520-240-T
9-5.3 FORMATION LIGHTS OPERATIONAL CHECK
9-5.3
INITIAL SETUP
Applicable Configurations:
W i t h o u t
Tools:
None
Materials:
None
Personnel Required:
Aircraft Electrician (2)
References:
TM 55-1520-240-23
Equipment Condition:
TM 55-1520-240-23:
Battery Connected
Electrical Power On
Hydraulic Power Off
Visual Check of Formation Lights Performed (Task
9-5.2)
TASK
RESULT
1.
2.
3.
4.
Check that LIGHTING FORM circuit break-
If FORM circuit breaker (1) is open, close it. If it
er (1) is closed.
opens again, go to task 9-5.4.
Set FORMATION LTS switch (2) to DIM.
Five formation lights shall come on dim. If any light
is not on, go to task 9-5.5.
Rotate FORMATION LTS switch (2)
Five formation lights shall get brighter as switch is
through intermediate positions to BRT.
turned to right. If lights go out or brightness does
not increase, go to task 9-5.6.
Set FORMATION LTS switch (2) to OFF.
Five formation lights shall go out.
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23:
Electrical Power Off
Battery Disconnected
9-142/(9-143
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Change 2
