Originally Posted by
RoyHudd
More to the point, I trust the flight crew calculated IFLD (In-Flight Landing Distance). The A321 is a slippery beast, reversers are generally not much use, and the full length 2500m runway was definitely going to prove tricky with the 0/0 temp split, 12 knot crosswind, +SNRA and medium/poor BRAKING ACTION.
The QRH landing performance calculation shows that it was marginal at best, (IFLD comes to 2350 m, assuming low landing weight, CONF Full, Autobrake MED and a fully serviceable aircraft with no MEL items to affect. Factored Landing Distance, as advocated by Airbus, is 1.15 *IFLD, which comes to 2702 meters, over 200 meters longer than the full runway length. LDA is doubtless down to around 2200m, so an overrun was inevitable). Aquaplaning and/or temporary loss of directional control due to employment of full reverse would lengthen the landing run substantially, causing a yet longer overrun.
Standard winter conditions for that part of Russia though, but never easy with a slippery jet. And if the approach was a few knots fast, therein the problems really mount up.
And why would anyone "hope" that it was weather-related rather than fatigue of the pilots. Such a stupid comment, given above. Not a professional pilot.
The majority of Russian airports (and UMKK as well) gives the normative brake coefficient. So runway state 24/59//32 corresponds to POOR braking action with undetermined depth of wet snow
Last edited by Anvaldra; 5th Jan 2017 at 20:45.