Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Why Do Airbus Elevators+Ailerons Droop Down?  
User currently offlineOlympic A-340 From United States of America, joined Apr 2000, 780 posts, RR: 9
Posted (15 years 4 months 3 weeks 21 hours ago) and read 4418 times:

I have a quick question about Airbus aircraft, Why do the Elevators and Ailerons "droop" downward when the aircraft's engines are shut down? Also when the engines are started back up after push back, why does the plane make this grinding sound? My theory is that it is the hydralics being turned on or off, but could you please explain in better detail why this happens.

Olympic A-340

3 replies: All unread, jump to last
User currently offlineHeavyJet From , joined Dec 1969, posts, RR:
Reply 1, posted (15 years 4 months 3 weeks 4 hours ago) and read 4373 times:

They droop do to the lack of hydraulic pressure from the engine driven hydraulic pumps or the electric hydraulic pump running.

As for the grinding sound, you'll have to be alittle more specific has this could be numerous things.

User currently offlineHeavyJet From , joined Dec 1969, posts, RR:
Reply 2, posted (15 years 4 months 3 weeks 3 hours ago) and read 4368 times:

Now that I think about it, the closes thing to a "grinding" sound you hear may be the jackscrews as the flaps/slats are being lowered.

User currently offlineFDXmech From United States of America, joined Mar 2000, 3251 posts, RR: 30
Reply 3, posted (15 years 4 months 3 weeks 1 hour ago) and read 4354 times:

Under Tech/Ops, look at the topic "Ailerons" for an explanation.

You're only as good as your last departure.
Top Of Page
Forum Index

Reply To This Topic Why Do Airbus Elevators+Ailerons Droop Down?
No username? Sign up now!

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!
Add Images Add SmiliesPosting Help

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

Similar topics:More similar topics...
Why Do MD-8x Elevators Deflect Up? posted Mon Jul 22 2002 10:29:26 by Shaun3000
Why Do Boeings Have Yokes And Airbus's Joysticks? posted Mon Mar 5 2001 03:52:07 by 9V-SPJ
Why Do Wings Need To Be Longer, Not Wider? posted Thu Mar 8 2007 06:22:51 by CoolGuy
Why Do Sidesticks Make Mech Backup Impossible? posted Sat Feb 24 2007 04:12:35 by Blackbird
Why Do A Wings Climb, B Wings Cruise Better? posted Sun Jan 28 2007 08:54:07 by Art
Why Do UA's 777's Smoke So Much? posted Mon Jan 8 2007 08:59:23 by DeltaJet757
Why Do Airports Have Both 3 And 4 Letter Codes? posted Wed Oct 11 2006 00:28:23 by AirPacific747
Why The Airbus A380 Has Only Two Thrust Reverser? posted Sun Jul 2 2006 14:26:20 by 747400sp
Why Do I Never See Turbprops Making Contrails? posted Fri Jun 16 2006 14:37:15 by Ba757gla
Why Do Airlines Furlough posted Sat May 13 2006 22:59:26 by AirWillie6475

Sponsor Message:
Printer friendly format