Slink Thanks,
Not sure what you're going to prove now you've got the numbers though...
Well as you can see already, just getting a 'feel' for how short the aircraft touched down - looking like 7~800 metres now....
Unless the aircraft config. was totally wrong (airbrakes, thrust reversers) then that distance is a fundamental number that represents a combination of lack of power from the norm, and/or wind & thermal activity from that dialled in.
The AIB won't be coming at this from just
one angle of 'what went wrong',
let's use gold contacts for that switch from now on and everything will be alright...
They'll want to have
all their sums add up from
every angle, and one is to know exactly how much thrust was calculated as being missing over what period - whether the Flight Recorder gives that figure or not, as a double check and no doubt other methods as a third check too.
Using the a/c config at various points, wind data, and the 777's Lift/Drag polars and how short the plane came in, that isn't too much to do by hand with a sliderule, let alone plugging it in to a flight performance program and integrating the whole profile (which is what they will do).
PS. Ref. above and dirt in engines... Agree! It would not be easily visible evidence anyway. You would be looking more closely at blade erosion and dirt penetration throughout the whole engine.