Originally Posted by
JanetFlight
One of the four tonneaux ended at around 4000ft on a 90º nose down attitude.
I'm guessing that you're using "tonneaux" in the French sense of "barrel" (i.e. roll) and/or "somersault". Sounds extremely scary.
Swapped aileron controls (so when a right input, the a/c would turn left and vice-versa)
In the good old days of cable-and-pulley flying controls, after a few similar events systems were designed so that it was physically impossible to connect them in a reversed sense. It sounds like in today's FBW world, Murphy is alive and well and back in business.