Adverse Weather

Question 1

Is it permissible to use Assumed Temperature Method on a contaminated Runway?

Answer 1

No

Question 2

Is it permissible to use Fixed Derate on a contaminated runway?

Answer 2

Yes

Question 3

Is it Is it permissible to use Assumed Temperature Method on wet runways?

Answer 3

Yes

Question 4

When is it prohibited to use Assumed Temperature for take off?

Answer 4

On contaminated runways.

Question 5

When do icing conditions exist?

Answer 5

When OAT (Ground) or TAT (Inflight) is below 10ºC and visibility is less than 1600m OR the runway is contaminated.

Question 6

Is Hoar frost on the upper surface of the fuselage acceptable?

Answer 6

Yes, provided all the vents and ports are clear.

Question 7

Is Wing anti ice normally used for de-icing or anti-icing?

Answer 7

De-icing.

Question 8

Is Engine Anti ice used a de-ice or anti ice?

Answer 8

Anti ice!

Question 9

What indication should be referenced for temperature on the ground?

Answer 9

OAT

Question 10

What indication should be referenced for temperature in flight?

Answer 10

TAT

Question 11

How much ice and on what service is is allowable whilst adhering to the clean wing principle?

Answer 11

Light coatings of frost, up to 3 mm in thickness, on lower wing surfaces due to cold fuel is allowable.