Rudder actions
Indeed, rudders, and their sometimes strange actions, notwithstanding pilot inputs.
Now, with American Airlines, their poorly thought out advanced maneuvering program, and the possibility of a rogue First Officer using the rudder in an inappropriate manner...this is bad enough.
But, perhaps not nearly as bad as Boeing, as those with very long memories will recall, again with American Airlines, and one of their B707's suffering a rudder hardover just after takeoff in the very early 1960's, from IDL (now (JFK).
A swan dive straight into Flushing Bay.
Did Boeing cover this up, with the help of the FAA?
You be the judge, but the 707 was a known quantity with regard to rudder hardovers...for quite a long time.
And, the result was, shall we say, not good.
That large rudder power guarded switch, painted red with white stripes was there for a reason, and was certainly used more than one time, you can be sure.