TM 55-1520-240-T
9-5.9 FORMATION LIGHTS OPERATIONAL CHECK (WITH )
9 - 5 . 9
INITIAL SETUP
References:
Applicable Configurations:
TM 55-1520-240-23
With
Equipment Condition:
Tools:
TM 55-1520-240-23:
Night Vision Goggles AN/AVS-6 or AN/PVS-5A
Battery Connected
Electrical Power On
with Daylight Filter Installed
Hydraulic Power Off
Materials:
VisualCheck of Formation Lights With Per-
None
formed (Task 9-5.8)
Personnel Required:
Aircraft Electrician (2)
TASK
RESULT
1.
2.
3.
4.
5.
6.
7.
8.
Check that LIGHTING FORM circuit break-
er (1) is closed.
Check that LIGHTING NVG FORM circuit
breaker (2) is closed.
Set FORM NVG-NORM switch (3) to
NORM.
Set FORM BRT-DIM switch (4) to DIM.
Rotate FORM BRT-DIM switch (4)
through intermediate positions to BRT.
Set FORM BRT-DIM switch (4) to DIM.
Set FORM NVG-NORM switch (3) to
NVG. Use night vision goggles to view NVG
formation lights. During daylight hours shield
ambient light.
Rotate FORM BRT-DIM switch (4)
through intermediate positions to BRT.
Rotate FORM BRT-DIM switch (4) to
OFF.
If FORM circuit breaker (1) is open, close it. If it
opens again, go to task 9-5,10.
If LIGHTING NVG FORM circuit breaker (2) is open,
close it. If it opens again, go to task 9-5.11.
Five normal formation lights shall come on dim. If
any light is not on, go to task 9-5.12.
Five normal formation lights shall get brighter as
switch is turned clockwise. If lights go out or bright-
ness does not increase; go to task 9-5.13.
Eight NVG formation lights shall come on dim. If any
light is not on, go to task 9-5.14.
Eight NVG formation lights shall get brighter as
switch is turned clockwise. If lights go out or bright-
ness does not increase, go to task 9-5.15.
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23:
Electrical Power Off
Battery Disconnected
9-150.2/(9-150.3
blank)
Change 2
