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LH A-340-600 Wents Tech In Boston  
User currently offlineCX288 From Germany, joined Jan 2008, 142 posts, RR: 0
Posted (6 years 5 months 2 weeks 1 day 15 hours ago) and read 5574 times:

An Lufthansa A-340-600, incoming from Frankfurt on LH 422 went tech earlier today (06APR08) in Boston and its scheduled return flight has been cancelled.

Upon landing the nose gear turned around 90 degree, the crew then slammed on the brakes and the aircraft came to a stop on the runway but needed to be towed to its final parking position.

10 replies: All unread, jump to last
 
User currently offlineEA772LR From United States of America, joined Mar 2007, 2836 posts, RR: 10
Reply 1, posted (6 years 5 months 2 weeks 1 day 14 hours ago) and read 5512 times:

This is rare for the A346. It's proven to be a very reliable aircraft. Did LH send another 346 for the pax??


We often judge others by their actions, but ourselves by our intentions.
User currently offlineAirPortugal310 From Tokelau, joined Apr 2004, 3635 posts, RR: 2
Reply 2, posted (6 years 5 months 2 weeks 1 day 14 hours ago) and read 5474 times:



Quoting CX288 (Thread starter):
Upon landing the nose gear turned around 90 degree, the crew then slammed on the brakes and the aircraft came to a stop on the runway but needed to be towed to its final parking position.

Does it have the same mechanical nose gear setup as, say, the A320?



I sell airplanes and airplane accessories
User currently offlineRoseFlyer From United States of America, joined Feb 2004, 9639 posts, RR: 52
Reply 3, posted (6 years 5 months 2 weeks 1 day 14 hours ago) and read 5457 times:

It's not good to see a steering failure. The nose gear turning 90 degrees is a fail safe that Airbus employs shall there be a failing in the actuation system. Hopefully it is a quick repair, but troubleshooting steering can take a while. There are a variety of reasons for it to fail.


If you have never designed an airplane part before, let the real designers do the work!
User currently offlineJetMech From Australia, joined Mar 2006, 2699 posts, RR: 53
Reply 4, posted (6 years 5 months 2 weeks 1 day 13 hours ago) and read 5390 times:



Quoting AirPortugal310 (Reply 2):
Does it have the same mechanical nose gear setup as, say, the A320?

They are different. The A320 appears to have a single, double acting piston with a rack and pinion type arrangement. The A346 has the twin piston steering collar arrangement. It appears the A320 does not have scissor links on the nose gear.


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Quoting RoseFlyer (Reply 3):
The nose gear turning 90 degrees is a fail safe that Airbus employs

I'm curious if the A346 has that much physical steering arc available  Confused .

Regards, JetMech



JetMech split the back of his pants. He can feel the wind in his hair.
User currently offlineStylo777 From Germany, joined Feb 2006, 2975 posts, RR: 12
Reply 5, posted (6 years 5 months 2 weeks 1 day 9 hours ago) and read 5109 times:



Quoting EA772LR (Reply 1):
Did LH send another 346 for the pax??

I'm pretty sure that they could protect most pax on the evening LH421 (A343 service) or even LH425 to MUC.


User currently offlineAirbazar From United States of America, joined Sep 2003, 8371 posts, RR: 10
Reply 6, posted (6 years 5 months 2 weeks 1 day 6 hours ago) and read 4824 times:



Quoting Stylo777 (Reply 5):
I'm pretty sure that they could protect most pax on the evening LH421 (A343 service) or even LH425 to MUC.

Or LX via ZRH or even on one of the many TATL carriers that operate out of BOS. One good thing about BOS is that there is no shortage of TATL options and the canceled LH flight is one of the first to depart, leaving plenty of options to accomodate the passenegers on other flights.


User currently offlineJetMech From Australia, joined Mar 2006, 2699 posts, RR: 53
Reply 7, posted (6 years 5 months 2 weeks 1 day 5 hours ago) and read 4742 times:



Quoting JetMech (Reply 4):
It appears the A320 does not have scissor links on the nose gear.

I tell a lie, the A320 nosewheel does have torque links blush !

http://www.airliners.net/aviation-forums/tech_ops/read.main/216303/

Regards, JetMech



JetMech split the back of his pants. He can feel the wind in his hair.
User currently offlineLufthansa411 From Germany, joined Jan 2008, 692 posts, RR: 1
Reply 8, posted (6 years 5 months 2 weeks 1 day 3 hours ago) and read 4500 times:

Working that flight.

In the end, the nose gear was not the main problem, one of the "safety" computers onboard would not reset. Another one is being flown in from FRA today.

Most passengers were able to be rebooked on the two later flights, although there were people sent to hotels that had to go on today's flights.

There is talk of 4 flights out of BOS today if they can fix the plane. Should be a nice experience for all the involved passengers.

Lufthansa411

[Edited 2008-04-07 06:58:25]


Nothing in life is to be feared; it is only to be understood.
User currently offlineRoseFlyer From United States of America, joined Feb 2004, 9639 posts, RR: 52
Reply 9, posted (6 years 5 months 2 weeks 1 day 3 hours ago) and read 4469 times:



Quoting JetMech (Reply 4):
I'm curious if the A346 has that much physical steering arc available

I'm not familiar with the Airbus Widebodies, but I believe that the actuators are not in line with the fuselage which will allow them to rotate the gear closer to 90 degrees than for example landing gear on Boeing airplanes which max out in the 74-78 degree range.

I've had discussions with a few people about how Airbus allows the full rotation of the gear in case there is a failure in the system. Is there trail in the nose gear so that it automatically will center? It's hard to tell from the pictures.



If you have never designed an airplane part before, let the real designers do the work!
User currently offlineEA772LR From United States of America, joined Mar 2007, 2836 posts, RR: 10
Reply 10, posted (6 years 5 months 2 weeks 1 day 2 hours ago) and read 4296 times:



Quoting Stylo777 (Reply 5):
I'm pretty sure that they could protect most pax on the evening LH421 (A343 service) or even LH425 to MUC.

True. I forgot about them running their 343s to BOS



We often judge others by their actions, but ourselves by our intentions.
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