Old Piedmont crews used this unauthorized 'technique' on the classic 737's
My reference referred to propellers on - I think - a Capitol Viscount, but I don't want to malign anyone, so I didn't say that !
My source was a solicitor acting for the insurers, I've never read the report, and some legal skullduggery ( Shock ! Horror ! Really ? ) was involved when it came to apportioning liability, which is why he was telling me - over a beer one day.
Hoot said at the time that his aerobatic training allowed him to regain control of the aircraft
It shouldn't be necessary to be an Aerobatic ace to be in command of a public transport a/c. I recall a Comet captain converting to, and maligning, our much loved 707 of the day because he reckoned it could turn around and bite you, he reckoned a public transport a/c should be capable of being flown by the companys' worst pilot - on a day when he felt poorly ! ( I know, I know, we shouldn't fly when we feel poorly, but you might not when you start the flight )