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ManuCH
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Metal Noise When Sitting Above Gear On A330-200

Sun Jul 19, 2009 9:23 am

Recently I've been flying on an LX A330-200 and I was sitting in row 18. I assume that's more or less above the main landing hear.

Fact is, while taxiing, and even while just waiting on the taxiway or runway standing still, I heard strange metal noises coming from below. The best way to describe it is someone banging iron rods one against the other.

When lined up on the runway, the noise stopped for about a minute, while waiting for take-off clearance. Then, about 10 seconds before the engines started spooling up, the noise started again.

I was wondering what exactly produces these noises. Can anyone help?
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aerdingus
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RE: Metal Noise When Sitting Above Gear On A330-200

Sun Jul 19, 2009 12:31 pm

Maybe it could be the brakes?
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Starlionblue
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RE: Metal Noise When Sitting Above Gear On A330-200

Sun Jul 19, 2009 2:49 pm

Hydraulic pumps perhaps?
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HAWK21M
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RE: Metal Noise When Sitting Above Gear On A330-200

Sun Jul 19, 2009 8:25 pm

If the Noise existed mainly when moving,I would say Brakes.
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tdscanuck
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RE: Metal Noise When Sitting Above Gear On A330-200

Sun Jul 19, 2009 10:39 pm



Quoting HAWK21M (Reply 3):
If the Noise existed mainly when moving,I would say Brakes.

If it's the brakes, it specifically may be slack coming out of the torque rods. The brakes have some free-play about the axles, and react their torque through a rod connecting the two brakes (or the brake to the bogey, depending on the specific design). I can imagine you get a steel-on-steel "clank" when those first take up.

Tom.

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