Pilotes Québec

sierra wrote:Sa ressemble à un stall

Serge

Serge,

J'ai cru que ce serait plus approprié que dans Spécial Spécial qui est plus "léger" comme sujet.

Paul

Apparemment l'avion est très difficile à atterrir, spécialiement dans des vents de rafales.

D'un gars qui le pilote :

don't think it was just a bounced landing.

I flew MD-11s for 4 years.

The landing looks normal to a little hard. The nose comes down too fast. You have to really force the nose down on an MD-11.
Different than any other aircraft I have flown (even a DC-10), the nose wants to go UP after landing.

Copied from the Flight Manual:

Vol. 2 Norm 10-38:

After touchdown, fly nosewheel to the runway while raising reverse levers to reverse idle....
Maximum reverse thrust may be selected without delay and may occur prior to nosewheel touchdown.

Ground spoiler deployment causes nose up pitching moment. This effect is most noticeable at aft centers of gravity, It is important to check the nose up pitching tendency with forward pressure on the control column.

Deploying the #2 reverser also causes the nose to pitch up.

I did this in the Sim years ago.
You are landing in a cross wind and after main gear touchdown you pop the reversers and try too hard to get the nose down and the plane stopped. As the nose is still 35 feet in the air it is scary to see yourself careening down to the pavement. You automatically pull back hard to stop the nose from crashing into the runway.
At this very moment reversers 1 and 3 kick in full power and # 2 (in the tail) goes to idle causing a positive pitch moment. The ground spoilers come out causing a BIG positive pitch moment. (and boy is it big...)

With this positive pitch moment and you pulling back to save the nose, you have unwittingly rotated the aircraft. You are airborne again with the ground spoilers out and #1 and #3 reversers going full blast.

Airspeed is disappearing fast, you can't go around because the reversers are deployed so you shove the nose over or you stall and the nose GOES over.

Either way you are coming back down....and then you bounce. But by then it is too late to control the bounce.

It sucks and it is REALLY easy to do.

RIP

Edit:
As this is an aviation site, you might as well get it straight from the horses mouth

Wow, tu parles d'une procédure...

Voici un peu de détails, remarquez les vents

FedEx flight 80 departed Guangzhou (CAN), China on a cargo flight to Tokyo-Narita (NRT). The MD-11 landed in high winds on runway 16R/34L. The airplane is understood to have bounced on first touchdown, then dropped from 50-100 ft onto the nosewheel at which point, the plane rapidly banked to the left. The port wing impacted the ground and a fire erupted. The MD-11 rolled further onto its back and slid off the runway. Weather reported around the accident time (21:48 UTC): 2009/03/22 21:00 RJAA 222100Z 30013G28KT 260V330 9999 FEW020 13/M01 Q0998 NOSIG RMK 1CU020 A2948 2009/03/22 21:00 RJAA 222100Z 30013G28KT 260V330 9999 FEW020 13/M01 Q0998 NOSIG 2009/03/22 21:08 RJAA 222108Z 31025G35KT 9999 FEW020 12/M01 Q0998 RMK 1CU020 A2949 2009/03/22 21:30 RJAA 222130Z 32026G40KT 9999 FEW020 12/M02 Q0999 WS R34L NOSIG 2009/03/22 21:30 RJAA 222130Z 32026G40KT 9999 FEW020 12/M02 Q0999 WS R34L NOSIG RMK 1CU020 A2952 P/RR 2009/03/22 21:30 RJAA 222130Z 32026G40KT 9999 FEW020 12/M02 Q0999 WS R34L NOSIG

Pilotes Québec

Accident FEDEX au Japon

Accident FEDEX au Japon