Hey Glueball Thanks for your reply! The thing is the highest peak might be near Revki which is called DP1 (decision point) but when flying from MNL you will have a larger gross weight at DP2 (DOREX) with a MEA of 17500. So dp2 is more critical then the revki point due to the fuel burn that youve explained.
I have a flight planning and performance manual from KLM about the B772 and the maximum gross weight at that point is 256000kg. Sadly i dont have a manual for the B744 to compare it with.
My question is: Why do airlines use a B772 for the HAMI route when a 744 can carry way more? (flightplanning occurs for 50% of engine loss so an N-2 for the B744) Is the B744 weight restricted at the same point as the B772?