FAR 25 section 111 and JAR 25 certification are both in the event of the failure of the most critical powerplant. It says so right at the top. Also, it makes sense. If all the engines are running you can raise the flap at the flap up speed. This is where the confusion comes from and is why FSI teach it so badly. They spend all their time teaching people to fly away with one engine out and virtually no time at all teaching people to take advantage of all them jets..
This is the reason that no manufacturer mentions 400 feet during an all engines operating departure.
Is a two way bet and I'm two grand up now. Cheque going to the dogs home.
Last edited by tommoutrie; 19th Nov 2012 at 12:23.