Winter Ops

Question 0

When must cold wx preflight be preformed

Answer 0

OAT 5° C or less

Wing fuel temp 0°C or less

Atmospheric conditions conducive to icing

A/c parked overnight and may have been exposed to frost/ precip. Etc..

Any through flight where residual ice may be present

Cold soak ice suspected in fuel tank areas

Question 1

How much frost is allowed under wing

Answer 1

1/8 inch

Question 2

What should you do if taxing in icing conditions for > 30 mins or fan vibration is detected

Answer 2

Run each engine up individually to 54% n1 for 30 seconds

Question 3

When taking off in icing conditions…

Answer 3

Takeoff power must be set to 54% n1 for 30 seconds or until fan vibration is normal

Question 4

What do you do if you suspect Ice accretion on fan blades in flight

Answer 4

Reduce one thrust lever at a time towards idle then advance to min of 70% n1 for 10-30 seconds

Question 5

What auto brake setting for contaminated runways

Answer 5

Med