desert I found it interesting you have been in a similar mode of spin in that type.
I have spoken to a few other pilots that have also been in that mode and required power to get it out. I have never found anything documented on this alternative mode or for that matter a published recovery procedure.
Its is definitely not the usual Cessna spin which almost recovers itself if you let go of everything.
From 5000ft we recovered at 500ft agl to S&L coming out of rotation at 1000ft agl
Genghis with your boffin hat on have you got any ideas what was going on?
BTW if there are any budding test pilots out there wanting to prove MJ is talking nonsense I would strongly advise you are up at 8k-10k ft just in case you do get it to happen. It could be we had a bent wing or a unlucky gust at just the wrong time but if she does go it makes a tommy spin look tame.