da insbesondere die Absicht nur möglich ist, wenn beide es wollen

Tja, Egyptair 990 beweist das Gegenteil...

The FDR data indicated that the engine start lever switches for both engines
moved from the run to the cutoff position between 0150:21 and 0150:23.19
Between 0150:24 and 0150:27, the throttle levers moved from their idle position to full
throttle, the speedbrake handle moved to its fully deployed position [...]
During this time, the CVR recorded the captain asking, What is this? What is
this? Did you shut the engine(s)? [...]
Between 0150:31 and 0150:37, the captain repeatedly stated, "Pull with me"
However, the FDR data indicated that the elevator surfaces remained in a split condition
(with the left surface commanding nose up and the right surface commanding nose down)
until the FDR and CVR stopped recording at 0150:36.64 and 0150:38.47, respectively.

Links wollte leben, rechts wollte sterben...

https://www.ntsb.gov/investigations/AccidentReports/Reports/AAB0201.pdf

Uff, das war gemeinsam mit AF447 einer der übelsten "Unfälle", auch wenn es keiner war.

Bei einem "NICHT-FBW"-Flugzeug konnte der Captain den FO eben nicht aussschließen aus der Steuerung .. daher die "split elevators" ...