Go Back  PPRuNe Forums > Flight Deck Forums > Tech Log
Reload this Page >

Flying an Airbus with L+R Elev Fault

Wikiposts
Search

Notices
Tech Log The very best in practical technical discussion on the web

Flying an Airbus with L+R Elev Fault

Thread Tools
 
Search this Thread
 
Old 17th February 2006 | 11:31
  #1 (permalink)  
Thread Starter
 
Joined: Jul 2005
Posts: 133
Likes: 0
From: Dubai
Flying an Airbus with L+R Elev Fault

Sorry to bother you guys, but I wondered if you would kindly pen your thoughts for flying the a/c with an L+R elevator fault, specifically:
a. On t/o
b. landing
c. Go around
Who does the power, controls lateral movement of a/c etc.
It's a drill i hate doing and it's coming up in my sim soon. The last time I did it my Instructor wasn't too helpful (you get them everywhere i guess).
Thanks for your time
Keith
Keith Discovering is offline  
Old 17th February 2006 | 14:51
  #2 (permalink)  
 
Joined: Jun 2001
Posts: 1,178
Likes: 0
From: UK
This is a major emergency. Just look at the description in the FCOM!

Pitch - Mechanical backup (ouch!)
Roll - Direct Law (no real probs there)

You can only use Manual Pitch Trim to give you the the up and down bits. This is normally considered a temp situation whilst the pnf frantically (calmly and in an orderly fashion!) attempts to re-instate any affected computers.

If that is not possible you are looking at a loooooong straight in approach to atempt to minimse the pitch input requirements (easier said than done). Your stuck with Cat 1 only (personally I would use CAVOK as a yardstick!), a Flap 3 landing (to make life a little easier) and 10 kts on your Vapp (big deal) plus a third or so more runway required.

The trim is powerful and a small movement makes a significant pitch input so try and plan ahead. PF just flies and square root of nothing else. PNF does everything else.

Take off !!!!! if your on the ground - stay on the ground!
Landing - best you can from the above para.
Go Around - V. Difficult but, if absolutely unavoidable, remember that there will be a significant pitch power couple (normally hidden by Normal Law) so the trim use can be minimised.

Dont expect the results to be pretty. The aim of such a 'procedure' is to walk away.
FlapsOne is offline  
Old 20th February 2006 | 06:22
  #3 (permalink)  
Thread Starter
 
Joined: Jul 2005
Posts: 133
Likes: 0
From: Dubai
Thanks very much for taking time out to reply F1. spome good points.

Who do you recommend does the thrust? Non op pilot or operating?

Lateral control? Should OP do or Non op?

Pretty results they ain't

Kind regards

Keith
Keith Discovering is offline  
Old 20th February 2006 | 08:49
  #4 (permalink)  
 
Joined: May 2000
Posts: 2,135
Likes: 0
From: Camp X-Ray
I'd suggest PF does both thrust and lateral control. Lateral control really isn't a big issue in direct law but with the (re)introduction of the pitch pwer couple I'd wanting to be controlling my own engines if I was trying to trim the aircraft.
Hand Solo is offline  
Old 20th February 2006 | 17:53
  #5 (permalink)  
 
Joined: Jun 2001
Posts: 1,178
Likes: 0
From: UK
Totally agree with Hand Solo
FlapsOne is offline  
Old 21st February 2006 | 09:07
  #6 (permalink)  
Thread Starter
 
Joined: Jul 2005
Posts: 133
Likes: 0
From: Dubai
Thanks for the replies chaps. Much appreciated.

I'll let you know how it goes

Keith
Keith Discovering is offline  
Old 22nd February 2006 | 15:24
  #7 (permalink)  
PPRuNe supporter
 
Joined: Dec 2003
Posts: 1,676
Likes: 0
From: Planet Earth
landing

I suggest that when on final you take back the thrust control, don't worry about bleeding off the additional 10 knots at 300 ft, maintain your current attitude to touch down, when you anticipate the mains touching the runway, immediately select full reverse. Good luck.
Dream Land is offline  
Old 23rd February 2006 | 18:16
  #8 (permalink)  
Community Builder
Community Influencer
30 Countries Visited
20 Anniversary
 
Joined: Feb 2002
Aviation Qualifications: AME
Posts: 4,179
Likes: 1,111
From: UK
I remember a divert from EDI into MAN a couple of years back with a similar problem. I think it was an ELAC1 (2) failure and the Blue AC pump went t1ts up too.

Captain said "it was a bit sluggish..."

For a total elevator failure am I right in thinking that both ELACs and SECs would have to fail?

Barring something mechanical of course.
TURIN is online now  
Old 23rd February 2006 | 18:35
  #9 (permalink)  
 
Joined: May 2000
Posts: 2,135
Likes: 0
From: Camp X-Ray
In control terms I think you'd need a failure of both ELACs and all three SECs to lose both elevators. Losing the blue hydraulics as well would be an extremely bad day but IIRC the elevators are also powered by the G+Y hydraulics.
Hand Solo is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.