I work as a test pilot, and have flown flight tests on various Airbus aircraft (but not the A321, although its control laws are similar to models I have flown)
It is possible on Airbus aircraft error of
uncommanded thrust reverser deployment as happen on Boeing 767 flight NG004, 26 May 1991 (Lauda Air)?
The aircraft also broke up in mid-air on the way down.
