Remember the American Airlines A300 that crashed in the US after the vertical stabiliser broke off? The co-pilot over stressed the tail by pumping the rudders in an attempt to get out of wake-turbulence.
In a similar situation in 2008,an Air Canada A319 encountered wake turbulence and the pilot’s rudder &side stick inputs put the aircraft into a slip,stressing the vertical stabiliser beyond certified limits. The pilot wasn’t aware that they were encountering wake turbulence and thought it was a problem with the flight control computers (perhaps similar to the Qantas A330 problems off the coast of West Australia).
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Read More:Even with flight computers,you can over stress an Airbus tail
