7 / 20

Under what conditions is a runway considered contaminated?

  • A

    When more than 25% of the runway surface area used is covered by water, slush, snow, or ice over 3 mm deep

  • B

    When 75% of the runway's required length and width are covered by contaminants such as snow, frost, ice, or sand

  • C

    When more than 50% of the runway surface area used is covered by water, slush, snow, or ice over 3 mm deep

  • D

    When more than 50% of the runway's required length and width are covered by contaminants such as snow, frost, ice, or sand

Refer to figures.
According to the European Union Aviation Safety Agency (EASA) Commission Regulation (EU) No 965/2012, ANNEX I - “Definitions for terms used in Annexes II to V”, Contaminated runwaymeans a runway of which more than 25% of the runway surface area within the required length and width being used is covered by the following:

(a) surface water more than 3 mm (0.125 in) deep, or by slush, or loose snow, equivalent to more than 3 mm (0.125 in) of water;

(b) snow which has been compressed into a solid mass which resists further compression and will hold together or break into lumps if picked up (compacted snow); or

(c) ice, including wet ice;

Therefore, "25%" is the correct answer.

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.

  • Austro Control
    1