Using the 1230Z YMML METAR from post #16, the weights from post #103 and the Airbus laptop performance figures (FOVE) the approximate computed optimum take off performance probably should have looked something like this;
363,000 KG TOW V1 154 V2 163 VR 173 FLAPS 3 FLEX TEMP 40C
If an input of 263,000 KG TOW was made the laptop would have spat out the following instead;
263.000 KG TOW V1 144 V2 147 VR 154 FLAPS 1 FLEX TEMP 73C
and if the ZFW of 227,000 KG had been entered as the TOW you would get
227.000 KG TOW V1 142 V2 142 VR 150 FLAPS 3 FLEX TEMP 74C
FOVE shows the take off run for both 363T and 263T as in the order of 3400-3550M where as 227T would be a take off run of only 2650M.
Perhaps some of you rocket scientists out there know the difference in thrust between Flex 40 and Flex 73. All I know is it is going to be significant! I haven’t flown one for a while, but if I recall correctly, Max Flex is a 40% reduction in thrust on the A345.
If it was an input error, it is easy to see that if you are planned to be down near the end of the runway anyway and then you add 100T, remove 10-20% of the thrust and rotate 15-20 knots early, the result is not going to be a good one.
Anyway, thank goodness everyone is alive to talk about it.