3 to 2 conversions
Existing STC’d
DC-10 to MD-10 (customer)
L188 (Atlantic Airways)
Airbus went from 3 to 2 with the change over from the A300B4 to A300-600/A310 but I believe that there were some B4s delivered to Garuda that were 2 crew?
The 737 was meant to be 3 crew and for a while United operated that way.
Ansett 767s were delivered 3 crew and operated that way for most of their lives until CASA approved a mod. (Which was one of the main sticking points in AN selling the assets as flyable….. no other authority wanted to approve the mod, I am lead to believe)
No 727's so your buddy was talking out of his butt!