737 Flight Crew Operations Manual
3.10
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-4Q8-SJA
3.10
L VALVE OPE N - Wing Anti-IceR VALVE OPEN - Wing Anti-Ice
1 Choose one:
2ISOLATION VALVE switch. . . . . . . . . . . . . CLOSE
3 PACK switch (affected side) . . . . . . . . . . . . . OFF
This causes the operating pack to regulate to
high flow in flight with the flaps up.
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WING ANTI-ICE VALVE OPEN
Condition:
A wing anti-ice L VALVE OPEN or R VALVE
OPEN light stays illuminated bright blue.
The wing anti-ice valve is not in the
commanded position.
WING ANTI-ICE switch is ON:
The wing anti-ice valve is failed closed.
WING ANTI-ICE switch . . . . . . . . . . . OFF
Avoid icing conditions where wing anti-ice is
needed.
■ ■ ■ ■
WING ANTI-ICE switch is OFF:
The wing anti-ice valve is failed open.
►►Go to step 2
June 16, 2017
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