37.5 degree angle of bank, one engine out, gear down and at 500 feet

[clevlandHD]

DOVES,

on every airliner with swept wing (707 onward), the wing is twisted to mitigate the problem of wingtip stall. Modern wings will stall at the root first. Instead of wiki, you should read "Handling the Big Jets".
As for Deep Stall, it is a T-tail problem.