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On final approach to land in moderate rain, ATC transmits the following message pertinent to the landing runway: "Runway report at 12:43 UTC, runway 34, water up to 3 millimetres." What does the pilot expect to hear afterwards?

  • A

    Runway reported slippery.

  • B

    Braking action 50%.

  • C

    Good braking action.

  • D

    Estimated surface friction medium to good.

ICAO Document 9981 PANS -ADR

Assessment criteria Downgrade assessment criteria
Runway condition code Runway surface description Aeroplane deceleration or directional control observation Pilot report of runway braking action
6
  • Dry
 - -
5
  • Frost
  • Wet (The runway surface is covered by any visible dampness or water up to and including 3mm depth)

Up to and including 3mm depth:

  • Slush
  • Dry snow
  • Wet snow
 Braking deceleration is normal for the wheel braking effort applied AND directional control is normal Good
4

-15°C and lower outside air temperature:

  • Compacted snow
 Braking deceleration OR directional control is between Good and Medium Good to Medium
3
  • Wet ('slippery wet' runway)
  • Dry snow or wet snow (any depth) on top of compacted snow

More than 3mm depth:

  • Dry snow
  • Wet snow

Higher than -15°C outside air temperature¹:

  • Compacted snow
 Braking deceleration is noticeably reduced for the wheel braking effort applied OR directional control is noticeably reduced Medium
2

More than 3mm depth of water or slush:

  • Standing water
  • Slush
 Braking deceleration OR directional control is between Medium and Poor Medium to Poor
1
  • Ice²
 Braking deceleration is significantly reduced for the wheel braking effort applied OR directional control is significantly reduced Poor
0
  • Wet ice²
  • Water on top of compacted snow²
  • Dry snow or wet snow on top of ice²
 Braking deceleration is minimal to non-existent for the wheel braking effort applied OR directional control is uncertain Less than Poor

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