PPRuNe Forums - View Single Post - Side Slip (wing down/cross control) Landing Technique on Airbus (A330)
Old 15th Nov 2014, 13:14
  #82 (permalink)  
sonicbum
 
Join Date: Mar 2012
Location: Having a margarita on the beach
Posts: 2,423
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by titaniumwings
In other words will the aircraft's computer order the rest of the control surfaces to give 0 bank as the sidestick still orders "0" roll rate?
Yes. When you decrab as you know one wing will travel faster than the other and therefore generate more lift which ends up in induced roll. For crosswind up to 20 kt the normal law will manage to keep wings level or almost level by coping with the zero roll rate demand. With winds speed greater than 20 kt the induced roll during the decrab will have a greater intensity and therefore the pilot is required to adjust the wings by giving some side stick inputs. With very strong crosswind it may be quite challenging to coordinate it without risking to have one wing down during the flare, as you can see
.
Airbus tells you that 5 degrees of crab are still acceptable at touchdown to cope with the above mentioned difficulty. Now the question is : do you remember how many degrees of crab you had during your last crosswind landing ? Probably the answer is no, as I believe that you are not watching your ND at that stage, nor is your other CM. If something happens and findings reveal that you were well above these 5 degrees, you can have an interesting debate with whoever is concerned. Finally decrab the airplane following Airbus specs and if it is not feasible then you may want to explore the function enable alternate.
sonicbum is offline