As cabin crew I found this thread extremely interesting and educational thanks for starting it.
Now how about this. In the glory days of Flight Engineers on Classics, Tristars, DC10's etc. Would they have been able to fly and land it if the two drivers had been incapacitated?
They knew their way around the cockpit as well as the pilots and monitored approach and landing, I believe, even using the throttles.
I know when their role was withdrawn a number did retrain as pilots and some even reached dizzy heights of cabin crew!
