Anti-ice, Rain Flashcards
What parts of the 737 does the pneumatic system use bleed air for anti-ice?
Engine cowl lip
Leading edge slats
What parts of the 737 are heated electrically for anti-ice?
Pitot probes
Alpha vanes
Temperature probe
Elevator pitot probes
Flight deck windows
How are the cowl anti-ice valves controlled and operated?
Electrically controlled
Pneumatically operated
How are the wing anti-ice valves operated?
Electrically operated
What is the highest temperature to operate the engine or wing anti-ice?
OAT is above 10 degrees C
For what two reasons will the OVERHEAT light illuminate for a respective window for window heat?
If the respective window exceeds a predetermined limit
Or when electrical power to the window is interrupted.
What does the bright blue COWL VALVE OPEN light indicate?
- The position of the valve disagrees with the commanded switch position.
- The valve is in transit.
By selecting engine anti-ice on, which additional systems are affected?
- Stall warning logic is set for icing conditions.
- The EEC’s reset to approach idle.
What does the green TAI on the upper DU indicate?
Engine indications
The respective engine anti-ice valve is open.
What does the amber COWL ANTI-ICE light indicate?
An overpressure condition in the engine inlet cowl.
What does an amber TAI indication on the upper DU indicate?
Engine indications
The engine anti-ice valve and switch position disagree.
The blue L VALVE OPEN & R VALVE OPEN lights illuminate dim indicate?
The related wing anti-ice valve is open.
Placing the test switch to PWR TEST does what?
Provides a confidence test. ( Provides power to all windows )
Are static ports heated?
The static ports are not heated.
What does an amber light on the Probe Heat Panel indicate?
The respective probe is not heated.
