Will millions attempts, I still could not fly my plane over the train so that the lady can drop. It's just impossible to keep the speed slow enough to keep pace with the train. Any trick to that mission? Anyone found this difficult?

switch to 3rd person view so you can get a sense of how far above the train you are, and then do the drop off over the bridge...it's straight.

Try waiting until the train goes over the viaduct. The viaduct is long and straight, so you shouldn't have too much trouble keeping your plane lined up for the necessary few seconds.

Yeah, had a hard time with that one too (at first).

Same as above, easiest is to go for it when it's crossing the bridge. close in from behind & below (I extended my landing gear, was almost riding the rails). And don't forget to hit the airbrakes