SP 16 rpc

Question 1

how are Icing conditions defined?

rpc

Answer 1

Icing conditions exist when OAT (on the ground) or TAT (in-flight) is 10°C or below, and any of the following exist:
• visible moisture (clouds, fog with visibility of one statute mile (1600m) or less, rain, snow, sleet, ice crystals, and so on) is present, or
• ice, snow, slush, or standing water is present on the ramps, taxiways, or runways.

Question 2

conditions for takeoff with frost?

rpc

Answer 2

Takeoff with light coatings of frost, up to 1/8 inch (3mm) in thickness, on lower wing surfaces due to cold fuel is allowable,
however, all leading edge devices, all control surfaces, and upper wing surfaces must be free of snow, ice and frost.
Thin hoarfrost is acceptable on the upper surface of the fuselage provided all vents and ports are clear.

Question 3

what are the Run-ups needed In icing conditions during Taxi for TO?
(rpc)

Answer 3

If OAT is at or below 3°C and at or above -7°C:
Check that the area behind the airplane is clear.
Run-up to a minimum of 20 TPR (42% N1) for at least 30 seconds at intervals no greater than 60 minutes.
If OAT is below -7°C:
Check that the area behind the airplane is clear.
Run-up to a minimum of 20 TPR (42% N1) for at least 30 seconds within 60 minutes.

If takeoff is not completed within 60 minutes after the first runup, manually de-ice the engines before takeoff.

Note: If the time since the last de-icing procedure or run-up is more than 60 minutes, the engine must be de-iced per the AMM procedure.

Question 4

When should you perform an eng’ Run Up before TO?

Answer 4

When engine anti-ice is required and the OAT is 3°C or below, the takeoff must be preceded by a static engine run-up. Use the following procedure:
Run-up to a minimum of 50% N1 and a maximum of 55% N1 for at least 2 seconds to shed any possible ice on the fan.

Question 5

מתי לא ניתן להתניע 2מנועים בו”ז?

rpc

Answer 5

כאשר OAT

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