the pilot was issued with a logbook endorsement for loop, aileron roll, stall-turn, and wingover manoeuvres, after 4 hours of aerobatic flight training
This is interesting!
When I did aerobatics (last century!), with an ex-WWII instructor, I was told that if I screwed up an aerobactic manoevre(?) I would likely end up in a spiral-dive or a spin. Consequently, we did spins until he was confident that I could recover from all (well .... most!) eventualities!
I am surprised that someone can get signed off on stall-turns etc without (apparently!) having done appropriate spin training.
The pilot did not complete a full aerobatic training course that would have included vertical rolls and spins due to inclement weather
Dr 