I remember a similar case some years ago with a french domestic 320. The guys forgot to retract the landing gear leading to airframe vibrations as they gained speed which they took for engine vibrations. The captain called for ??? engine shutt down which of course didn't do a thing and this is where things go completly crazy.........He then took it to shutt the second one to his F/O's greatest dismay !! The guy then completly lost the plot.
Somehow, the F/O manages to resart one engine and to turn around to land back in Orly. Do I need to say the Captain was immediatly toasted.
Now, one of the pax was the Bishop of Tarbes a town just nearby Lourdes which, as every dyed in the whool catholic knows, is a place of pilgrimage where miracles happen !!
This is a true story !