Ice Protection Flashcards
When should engine anti-ice be used?
Before encountering visible moisture in temperatures of 5 degrees or below.
What parts of the aircraft are de-iced by the use of pneumatic de-icing boots?
- Wings
- Tailets
- Horizontal stabilizer
- Stabilons
Where is the vacuum for the surface de-icing system provided from?
Bleed air ejector.
When does the L/R ENGINE ICE FAIL light illuminate?
- The ice vane has not reached the extended position
- The ice vane has not reached the retracted position
- The actuator has failed
What is the max speed for effective windshield anti-ice?
223kts
If using the manual propeller de-icing system, for how long must the switch be held in position for?
90 seconds
In manual mode of the propeller de-icing system, does the current flow to each propeller alternatively or at the same time?
At the same time
Can you have the stall warning heat turned on, on the ground?
Yes, because a limit switch on the left landing gear prevents it from activating on the ground.
Are both the flapper and the plate surrounding the stall vane heated?
Yes
Fuel is heated by ……. to prevent ice from forming or collecting in the FCU?
Oil to fuel heat exchanger
What is the minimum recommended oil temperature for fuel heater operation at take-off power?
55 degrees C
How is the windshield heated differently in the HI position compared to the NORMAL position?
In HI a smaller part of windscreen is heated and therefore heats up faster than in the NORMAL position.
What components of the aircraft are protected against icing?
- Pitot vanes
- Static vanes
- Windshield
- Propellers
- Engine intake lip
- Stall warning vane
- Wing leading edges
- Tailets
- Horizontal Stabilizer
- Stabilons
- Fuel Vents
Is the stall warning probe heated during ground operations?
Yes but the current is limited to prevent overheating.
Where are the alternate static sources located?
On either side of the lower nose section
