Originally Posted by
chaps1954
Still don`t think it has altered the range it is allowed to fly
Allowed to fly? They dont have a set max range. If the aircraft consumes less fuel over a set distance then it has more range.
As has been said it will be due to etops requirements rather than winglets although suspect all the 757 are maintained to etops standards otherwise parts stockholding becomes a nightmare. The winglets will give a bit more leeway especially going westbound at this time of year.