AMC1 CAT.OP.MPA.300 Approach and landing conditions
CAA ORS9 Decision No. 15
LANDING DISTANCE ASSESSMENT
Before commencing an approach to land, the commander should ensure that a landing distance assessment has been completed in accordance with CAT.OP.MPA.303 and using the following:
(a) The in-flight landing distance assessment should be based on the latest available weather report and runway condition report (RCR) or equivalent information based on the RCR.
(b) The assessment should be initially carried out when the weather report and the RCR are obtained, usually around top of descent. If the planned duration of the flight does not allow the flight crew to carry out the assessment in non-critical phases of flight, the assessment should be carried out before departure.
(c) When meteorological conditions may lead to a degradation of the runway surface condition, the assessment should include consideration of how much deterioration in runway surface friction characteristics may be tolerated, so that a quick decision can be made prior to landing.
(d) The flight crew should monitor the evolution of the actual conditions during the approach, to ensure that they do not degrade below the condition that was previously determined to be the minimum acceptable.