Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
737 Flap-track Fairing Vibration  
User currently offlineAgnusBymaster 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.

8 replies: All unread, jump to last
 
User currently offlineStarlionblue 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.  Wink 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.


Tact Is For People Who Aren't Witty Enough To Be Sarcastic
User currently offlineAgnusBymaster 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.

User currently offlineDl757md From United States of America, joined May 2004, 1550 posts, RR: 20
Reply 3, posted (5 years 3 months 5 days 14 hours ago) and read 6042 times:

Quoting AgnusBymaster (Thread starter):
Just wondering if you think it's any cause for concern.

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.

DL757Md


757 Most beautiful airliner in the sky!
User currently offlinePilotaydin 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!
User currently offlineEMBQA From United States of America, joined Oct 2003, 9136 posts, RR: 15
Reply 5, posted (5 years 3 months 5 days ago) and read 5952 times:

Quoting Dl757md (Reply 3):
It is normal for some vibration on the inboard canoe fairing

Most all flap track fairings have built in shock dampers that allow movement due to the air loads that are applied them.


"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineDl757md 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.

DL757Md


757 Most beautiful airliner in the sky!
User currently offlineEMBQA From United States of America, joined Oct 2003, 9136 posts, RR: 15
Reply 7, posted (5 years 3 months 4 days 14 hours ago) and read 5884 times:

Quoting Dl757md (Reply 6):
Yes I agree.

Just backing up what you said.....  Smile


"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineHAWK21M From India, joined Jan 2001, 29818 posts, RR: 61
Reply 8, posted (5 years 3 months 4 days 12 hours ago) and read 5873 times:

Probably some pay in the Attach links which caused the excess vibration.
regds
MEL


Think of the brighter side!
Top Of Page
Forum Index

Reply To This Topic 737 Flap-track Fairing Vibration
Username:
No username? Sign up now!
Password: 


Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
  • DETAILED RULES
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)


Similar topics:More similar topics...
Light On 737 Flap Track Fairings posted Sun Aug 24 2003 20:35:04 by N243NW
Flap Track Systems posted Sat Oct 14 2006 14:25:20 by Avro85
Finnair MD11 Flap Track Fairings posted Wed Aug 9 2006 21:20:11 by LawnDart
737 Flap/slat Hydraulic Systems posted Mon Jun 13 2005 09:19:21 by Dl757md
Flap Track Fairings & Wing Efficiency posted Fri Dec 10 2004 17:48:12 by 2H4
Flap Track Fairings - Why? posted Thu Apr 1 2004 18:11:24 by B727-100
737 Vibration posted Sun Mar 7 2004 19:20:22 by Vs744
737 Vibration Flight Test posted Wed Mar 27 2002 00:16:14 by Apuneger
737- Can You Expain "mini" Flap? posted Tue Oct 16 2001 19:01:55 by Zionstrat
Delta 737-832-cockpit specifics posted Sat Nov 4 2006 18:02:55 by Badge

Sponsor Message:
Printer friendly format