In article ,
Mxsmanic wrote:

In older aircraft that require flight engineers, are these flight
engineers qualified to fly the aircraft in an emergency? If not, what
qualifications do they have? Do they have to be pilots (i.e.,
licensed)?

Well, Mxsmanic, they're usually the most senior, most qualified member
of the crew. They're basically the "admiral" of the flight, so to
speak, and they're the top of the chain of command.

Pretty wild, eh?