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Metal Noise When Sitting Above Gear On A330-200  
User currently offlineManuCH From Switzerland, joined Jun 2005, 3031 posts, RR: 44
Posted (6 years 10 months 1 week 4 days 3 hours ago) and read 5823 times:

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?

Never trust a statistic you didn't fake yourself
4 replies: All unread, jump to last
User currently offlineAerdingus From Ireland, joined Dec 2006, 3186 posts, RR: 9
Reply 1, posted (6 years 10 months 1 week 4 days ago) and read 5783 times:

Maybe it could be the brakes?

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User currently offlineStarlionblue From Greenland, joined Feb 2004, 17649 posts, RR: 65
Reply 2, posted (6 years 10 months 1 week 3 days 22 hours ago) and read 5744 times:

Hydraulic pumps perhaps?

"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineHAWK21M From India, joined Jan 2001, 31875 posts, RR: 54
Reply 3, posted (6 years 10 months 1 week 3 days 16 hours ago) and read 5660 times:

If the Noise existed mainly when moving,I would say Brakes.

Think of the brighter side!
User currently offlineTdscanuck From Canada, joined Jan 2006, 12710 posts, RR: 78
Reply 4, posted (6 years 10 months 1 week 3 days 14 hours ago) and read 5630 times:

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.


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