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A346 Nosewheel Question

Sat Dec 13, 2008 11:49 am

A week or so ago, i went to Germany on LH, estimated departure time was 615pm as our A346 (D-AIHF) was arriving late into Denver from Frankfurt. As departure time got close, and i was milling around the gate area, with no airplane in sight, i see an airport vehicle, lights flashing come up, the driver spoke to a couple of rampers who then jumped in a tug and followed the airport vehicle across the tarmac, then the other shoe came down, as the gate agents announced that the aircraft had landed but was having to be towed from the runway to the gate due to the nosewheel steering failing. We were further informed by the crew, once we boarded at around 9pm, that condensation in the nosewheel had caused the failure, so here's the question, does the A346 not have the standard steering wheel as other aircraft do? or does the fly by wire nature of the plane mean that the nose gear is steered with the sidestick controller? How would condensation affect the nose wheel steering?

Any ideas?
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RE: A346 Nosewheel Question

Sat Dec 13, 2008 4:30 pm

It seems like they lost hydralics? I am not entirely sure on the Airbus but I think hydraulic failure can cause this problem.......
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RE: A346 Nosewheel Question

Sat Dec 13, 2008 5:47 pm

Sounds like a Hydraulic leak to the steering system.
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RE: A346 Nosewheel Question

Sat Dec 13, 2008 6:02 pm

Or a BSCU (brake steering control unit) Went bad.
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RE: A346 Nosewheel Question

Sun Dec 14, 2008 6:43 am

Quoting NorthstarBoy (Thread starter):
... How would condensation affect the nose wheel steering?

Nose wheel steering is controlled by electric via the hand wheel (not the side stick) and the BSCU.
Condensation / moisture and electric can lead to trouble some time  Wink
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RE: A346 Nosewheel Question

Tue Dec 23, 2008 5:31 am

On the A346 there are 2 systems that can steer both green and yellow will do it. Sometimes when the pilot steers the aircraft too fast and the GS speed is low the BSCU will cancel his command and deactivate the nose wheel steering, it can be reset with a test but most likely a tow is the fastest way to get the airplane out of the way
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RE: A346 Nosewheel Question

Sun Jun 26, 2011 11:04 am

the A380 also had quite some trouble with nose gear steering. there are sensors on the NLG reporting the position of the gear, wheather it is on the ground or not etc. moisture can cause these sensors to fail. if the computer doesn´t get its needed data, it resticts the nose gear steering

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