TM 55-1520-240-23-7
9-124.1
LIGHT LEAK TEST
(Continued)
9-124.1
28.
Set DOME LIGHTS switch (47) to OFF.
29.
Set CAUTION LT DIM-BRT switch (48) to BRT.
30.
Set and hold CAUTION LT TEST switch (49) at
TEST. Check master caution panel (50). There
shall be no white light leaks.
31.
Check two master caution indicators (51 and 52).
There shall be no white light leaks.
32.
Release switch (49) to OFF position.
33.
Close ILLUM SW PWR circuit breaker (53) in
No. 1 PDP (23).
34.
Check PLT INST control (5) is set to OFF.
35.
Press five switches (54) of pilot’s HSI mode
select panel (13). There shall be no white light
leaks when each switch light is on.
36.
Repeat step 35 for five switches (55) of copilot’s
HSI panel (56).
37.
Press three switches (57) of AFCS panel (58).
There shall be no white light leaks when each
switch light is on.
38.
Open ILLUM SW PWR breaker (53) in No. 1
PDP (23).
9-482
