AgnusBymaster From United States of America, joined Feb 2001, 649 posts, RR: 0 Posted (5 years 3 months 5 days 16 hours ago) and read 6068 times:
I was flying on a 737-700 recently, and noticed that the flap-track fairing closest to the fuselage (ie. closest to the left engine) was vibrating pretty seriously while we were on final approach (a high frequency, short arc pendular motion). I started noticing this at flaps 5, but it was more pronounced by flaps 30. The other two flap-track fairings further out on the wing were not vibrating like this, so I assume it was because of the engine wake. It was a very smooth final approach and smooth landing, so nothing out of the ordinary there. Just wondering if you think it's any cause for concern.
Also, on rotation for takeoff, this big splotch of water came down from the ceiling and landed in the aisle. I assumed this was just condensation that got channeled back during takeoff.
Starlionblue From Greenland, joined Feb 2004, 14992 posts, RR: 69 Reply 1, posted (5 years 3 months 5 days 16 hours ago) and read 6061 times:
Vibrations are in most cases a good thing. You'd rather it flexes than snaps. This goes for wings and flap tracks.
Quoting AgnusBymaster (Thread starter): Also, on rotation for takeoff, this big splotch of water came down from the ceiling and landed in the aisle. I assumed this was just condensation that got channeled back during takeoff.
Yes. I have seen both rain and snow in the cabin.
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AgnusBymaster From United States of America, joined Feb 2001, 649 posts, RR: 0 Reply 2, posted (5 years 3 months 5 days 15 hours ago) and read 6054 times:
Well frankly, the aft tip of this flap-track fairing was moving from side-to-side so much I thought it might be ready to break off. But, I assumed it was just designed to withstand those forces.
It is normal for some vibration on the inboard canoe fairing. Without seeing it firsthand it is impossible to tell if it was an abnormal amount. There really is not much concern needed at least not as far as your safety is concerned. Canoe fairings have (very rarely) fallen off in flight with no adverse affect on the safety of the aircraft. It does increase drag. You are perfectly within in your right on any flight to report anything you see that you think is out of order. Most of the time passenger reports upon investigation reveal nothing. It does happen though that legitimate discrepancies are detected as a result of a passenger reports. So speak up to the crew.
Pilotaydin From Turkey, joined Sep 2004, 2489 posts, RR: 52 Reply 4, posted (5 years 3 months 5 days 3 hours ago) and read 5984 times:
this is quite normal on the 737, the lower the flap deploys, the more thrust you need because of drag, to a point, and the more it slides down into the exhaust it will vibrate a lot...
The only time there is too much fuel onboard, is when you're on fire!
Dl757md From United States of America, joined May 2004, 1550 posts, RR: 20 Reply 6, posted (5 years 3 months 4 days 19 hours ago) and read 5913 times:
Quoting EMBQA (Reply 5): Most all flap track fairings have built in shock dampers that allow movement due to the air loads that are applied them.
Yes I agree. I didn't mean to make it sound like the inboard canoe was the only one that can vibrate rather I was just referring specifically to what the thread starter saw.
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From United States of America, joined Feb 2001, 649 posts, 
From Greenland, joined Feb 2004, 14992 posts, 
This goes for wings and flap tracks.
From Turkey, joined Sep 2004, 2489 posts, 
From India, joined Jan 2001, 29818 posts, 
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