Originally Posted by
parabellum
Obviously some different theories abound, having flown the B747-400, 757-200 and 767-300ER, different companies, the rule was always the same, never reduce TO power below CLB power. I was comfortable with that!
It can be down to what the operator pays Boeing for the derate 777-300ER can be 40% giving an assumed temperature of around 76deg, (aircraft virtually empty) but if you've got full thrust climb in the climb page at thrust reduction the thrust levers will go forward and give more thrust, weird to see. (Old SOP to always have full climb, days of expensive fuel)
The 777-200 F and LR with a max derate of 25% empty gives excessive exceleration (trend vector of 80kts) and higher than normal pitch attitudes after TO, great to get the power off at 1000ft if you don't fly these aircraft empty regularly.
Never saw it on the 75/76 never had the pleasure of the 747.
Cheers Enos