I meant to post "Pilots don't understand difference between RNAV overlay and underlaying approach" but I'm having second thoughts. I'm not sure it's a myth anymore.
Originally Posted by old,not bold
And then there's the myth that a B747-400 with one engine inoperative is precisely as safe as one with all 4 running properly.
Never heard of this one. Methinks original myth was "It is under no circumstances safe to cross the pond on three out of four engines"