Wing contamination is serious business. Ice with the thickness and texture of sandpaper on the surfaces of an aircraft could decrease lift by 30% and increase drag by 40%. As ice accumulates on a wing, the stalling speed increases and the angle at which the wing will stall decreases.
Clean Aircraft Concept:
- refers to take-off being prohibited when frost, snow or ice is adhering to any critical surface of the aircraft
Critical Surfaces refers to:
- wings
- control surfaces
- propellers
- horizontal stabilizers
- vertical stabilizers
- upper surface of fuselage in the case of aircraft with rear-mounted engines
CAR 602.11 Aircraft Icing
- no person shall attempt to conduct a take-off in an aircraft that has frost, ice, or snow adhering to any of its critical surfaces
- exception: frost on underside of wing caused by cold-soaked fuel (refer to manufacturer's instructions)
- take-off in icing conditions
- Part 705: PIC (or person designated by operator) must inspect immediately prior to take-off (or operator has established aircraft inspection program)
- Part VII other than subpart 5: operator has established aircraft inspection program
- report observed ice to PIC (or designated person) so they can inspect
- PIC must inform other crew members of intention to de-ice/anti-ice
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