MD-11 ?

[Francis Bergeade]

MD-11. On le décrit un peu à part, à tort ou à raison ?
Les afficionados disent que c'est une fusée (j'ai déjà lu sur rcoco.com que c'est la Ferrari 308 des liners), les autres disent que c'est un vieux machin (les chiottes sont ridicules, mais toujours propres, les pax essuient la lunette à l'entrée et à la sortie), les PNC me disent que c'est leur cauchemar (pas de zone ni de couchettes de repos).

Moi je le trouve très beau. Je n'oublie pas non plus celui perdu à l'atterrissage à Narita (on m'avait expliqué toujours sur rcoco.com la spécificité du train du MD-11 et de l'aile qui s'arrache comme une brindille).

Ici, on parle d'un training spécifiquement recommandé pour ses cochers :
http://online.wsj.com/article/SB1000142 ... smartbrief

By ANDY PASZTOR

Despite more than a decade of efforts to improve the safety of McDonnell Douglas MD-11 jets, U.S. accident investigators on Tuesday called for stepped-up pilot training world-wide to counter landing incidents that continue to plague the widely used cargo planes.

Prompted by seven serious MD-11 landing incidents over the past two years—including a pair of botched touchdowns overseas that resulted in a loss of both aircraft—the National Transportation Safety Board said it is concerned that cockpit crews aren't effectively trained to cope with the MD-11's difficult handling characteristics.

In its recommendations, the board called on U.S. air-safety regulators to mandate enhanced training to help pilots keep the three-engine jets from descending too rapidly and then bouncing during landings. "Despite the corrective actions taken" by the Federal Aviation Administration and MD-11 operators over the years, the NTSB concluded, pilots still need additional training to make appropriate adjustments to engine thrust and flight-control surfaces to prevent accidents.

Since going into service in 1990, MD-11s have suffered a total of 14 serious landing incidents, including four accidents that ended with the complete loss of the aircraft, the NTSB said.

In March 2009, a FedEx Corp. MD-11 crashed and burned after landing hard, bouncing twice and snagging a wingtip on the ground at Japan's Narita International Airport, killing both pilots. In July 2010, the fuselage of an MD-11 cargo plane operated by Deutsche Lufthansa AG broke apart in Riyadh, Saudi Arabia after the jet touched down hard and bounced twice, injuring both pilots. In both accidents, the planes experienced excessive vertical forces and steep, nose-up maneuvers that exceeded normal safety guidelines

Since the late 1990s, regulators, pilots and accident investigators around the globe have been aware that the MD-11's computerized flight controls produce finicky handling that can make the planes tricky to land. From the start, pilots worried about controlling the long fuselage in crosswinds, and documented a tendency of the nose to pitch up at critical moments of touchdown. The MD-11's control column, or yoke, is considered to be more sensitive than those on other large jets, so pilots are prone to over-control the planes in certain situations.

Introduced by McDonnell Douglas Corp. as primarily a passenger jet, the MD-11 quickly gained a reputation as an unforgiving airplane. The FAA and Boeing Co., which inherited the aircraft when it took over McDonnell Douglas, devised various steps over the years to improve MD-11 handling, including software changes to dampen flight-control commands.

The planes are now used almost exclusively to carry cargo or to fly charter trips.

But the latest NTSB recommendations highlight that some of the original safety issues persist, largely because of the MD-11's handling problems close to the ground. According to the safety board, "enhanced operational guidance and recurrent training will provide near-term improvements" to reduce MD-11 risks.

Once MD-11 operating manuals are updated, the safety board also wants pilots to receive special training in "bounce recognition and recovery" procedures as part of their routine simulator-training sessions. The board's recommendations aren't binding on the FAA or operators.

Write to Andy Pasztor at andy.pasztor@wsj.com

Et vous les pros, votre avis ?

[4T60A]

Il faudrait trouver ici un pilote qualifié MD11. Ca ne doit pas courir les rues chez les PNT français .... Mais en effet j'avais entendu parler de cet engin comme étant délicat à l'atterrissage. L'article que tu mets en lien semble l'accréditer. D'après ce que j'ai cru comprendre dans certaines configurations (centrage, etc) il y a un risque non nul que le stabilisateur horizontal décroche comme le ferait une aile, et ce avant la voilure. Et alors se retrouver avec un engin en train de piquer irrémédiablement à quelques dizaines de pieds du sol, ce n'est pas une situation d'avenir, à mon avis... Sinon moi itou en tant qu'airfan, je le trouve très beau.

[MD11]

D'un point de vue sécurité, c'est vrai qu'il n'a pas les statistiques, ni l'historique pour lui.
Mais il est tres beau

[HI-STAGE]

Il a surtout contre lui le manque de développement ; lors du rachat de MD par Boeing c'était commercialement et industriellement "normal" de sacrifier quelques modèles...

[DC8]

je ne suis pas qualifie MD11 mais j'ai lu un rapport il y a longtemps (Fedex ?) qui expliquait une particularite de construction du train principal qui faisait qu'en cas d'atterrissage un peu dur en disymetrique sur un train celui -ci fracturait le longeron, l'aile plie et tu tu retrouves sur le dos.
Malheureusement les 3 ou 4 derniers accidents de MD 11 c'est cela.