Ice and Rain Protection Flashcards
Which part of the wing is de-iced?
All three outboard leading edges are heated by bleed air extracted from the engines. Each engine provides bleed air for the respective wing anti-ice. (B1214-12-10 Pg 2)
Which systems are included in the ice and rain system?
The ice and rain protection system includes:
- Wing anti-ice system .
- Engine anti-ice system .
- Windshield heating system .
- Air Data Smart Probe (ADSP)/TAT heating system .
- Windshield wiper system .
(B12 14-12-01 Pg 1)
What happens to the engine anti-ice valve if
electrical power is lost?
The engine bleed valve is fail safe open if either the electrical or pressure signal are not present. (B12 14-12-10 Pg 1)
What happens when a bleed source fails in the wing anti-ice system?
If one bleed air fails, the anti-ice system automatically opens the cross bleed valve and uses the opposite bleed for both wings anti-ice.
The APU is not capable of supplying bleed air for the anti-ice operation.
(B1214-12-10 Pg 2)
With ENG selected on the T /0 data set page with AUTO selected on the mode switch and ice detected, when will the wing anti-ice system come on?
Wing Anti-Ice will activate 1700ft AGL or 2mins after liftoff.
Engine Anti-Ice will be activated when Engines running.
(B1214-12-10 Pg 10)
When does the air data smart probe heating come on?
Auto mode: The ADSP and TAT are heated whenever an engine is running or the airplane is airborne.
Manual mode: If the ADSP Heater pushbutton is pushed IN, the ADSP heating system will be powered, overriding the system logic on ground.
When the batteries are the only electrical source to the airplane, only the ADSP 3 will be heated.
B1214-12-10 Pg 13)
Ice detectors will command the wing and engine anti ice valves to open and remain open for how long?
5 minutes after the icing conditions is no longer detected
How long does the windshield PBIT last?
120 seconds
If REF A/I on the MCDU is set to OFF and on T/O roll icing conditions are encountered will the de-icing system turn on?
Not until 1700ft or 2 minutes after T/O (Whichever happens first)
The wing anti-ice system tests itself during flight when?
10 min after T/O or at 10,000 ft AGL (Whichever happens first)
What is the activation logic of the ice-system in case the MCDU sets the ALL position?
Engine anti-ice valves are commanded open after completion of engine start
Wing anti-ice are commanded open with wheel speed above 40kts
When are the Air Data Smart Probes heated? (AUTO Mode)
Engine Running or airplane is airborne
The SAI IBIT (Wing anti ice) duration is?
60 seconds
The engine cowls are heated with air from the high or low stage compressor?
Low Stage compressor
How many slat panels per wing are pneumatic heated?
3
