Originally Posted by Airhoss

Setting flaps 15 instead of 5 is a non starter. Flaps 15 and flaps 5 is the same minimum maneuvering speed on a 777. It’s an extremely common mistake for people to call for/ set 15 instead of 5 on a flaps 20 take off. It’s a complete non issue. There is more to the story, a lot more.