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Metal Noise When Sitting Above Gear On A330-200  
User currently offlineManuCH From Switzerland, joined Jun 2005, 3011 posts, RR: 46
Posted (5 years 2 months 4 days 8 hours ago) and read 3818 times:
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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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4 replies: All unread, jump to last
 
User currently offlineAerdingus From Ireland, joined Dec 2006, 2836 posts, RR: 15
Reply 1, posted (5 years 2 months 4 days 5 hours ago) and read 3778 times:

Maybe it could be the brakes?


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User currently offlineStarlionblue From Greenland, joined Feb 2004, 17040 posts, RR: 66
Reply 2, posted (5 years 2 months 4 days 3 hours ago) and read 3739 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, 31684 posts, RR: 56
Reply 3, posted (5 years 2 months 3 days 21 hours ago) and read 3655 times:

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



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User currently offlineTdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 79
Reply 4, posted (5 years 2 months 3 days 19 hours ago) and read 3625 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.

Tom.


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