Ice And Rain Protection Flashcards
What is the definition of icing conditions?
Icing Conditions are said to exist when the OAT on the ground or the TAT in flight is 10’C or less and visible moisture is present, such as clouds or fog, rain, snow, sleet or ice crystals or standing water, slush, ice or snow.
What affect does using the engine anti ice have on engine performance?
It reduces performance as bleed air is used for anti-icing purposes.
After landing, if icing conditions are still present, when should the anti-ice pb be switched off?
Once safely parked on stand?
On approach, when should the wing anti-ice be switched off?
Generally at around the FAF, however if the ice accretion is still visible then it can be left on until after landing.
After take off, if wing anti-ice is needed, when should it be switched on?
After thrust reduction altitude.
Which slats are anti-iced?
The three outboard slats 3, 4, 5 of each wing are anti-iced.
When are the drain masts heated?
Any time there is electrical power to the aircraft they are heated.
When will the probe heating come on?
When there is at least one engine running, and when the aircraft is in flight.
Can the rain repellant be used on the ground?
No, it is inhibited on the ground.
If Wing Anti-Ice fails, does the valve stay open or closed?
FCOM SYS 30 Ice and Rain Prot - if the electrical supply fails the valves close.
If engine anti-ice fails, does the valve stay open or closed?
If electrical power fails, the valves open.
PROBE/WINDOW Heat ON, on ground what is heated?
FCOM SYS 30 - The TAT probes are not heated and pitot heating operates at low level (the changeover to normal power in flight is automatic)
When can we use WING ANTI ICE following ENG problems?
After ENG 1(2) SHUT DOWN
ONLY if ENG FIRE pb NOT pushed. Reason: In order to have symmetrical Wing Anti Icing, we need to open the X BLEED. Opening of the X BLEED only if FIRE pb NOT pushed.
