Cathay:- before this little fuel problem we used:-
Rolls Royce 200 and 300's CI 60
GE 300ER CI 80
Now they want us to reduce to CI 20 ( for all models ) where it can save fuel.
However the Eagle flight plan system is still produced using the old CI's above, but they have included a table to show the fuel saving and extra time for a CI of 20 and we are then supposed to adjust the burn accordingly.
Funny thing is that for a Roller 200 and 300 the difference in burn for up to a 9 hr flight is 0, only extra time to get there!! So we don't bother adjusting anything.
On the ER the saving on a 15 hr Flt is about 300 to 500 KG's but a time loss of 8 mins.