little jumps before take off

[osvep]

In some aircraft ie an airbus 340 freeware I see little jumps and dust effects in the landing gear before reaching rotation speed.Which is the cause ? Have I omitted some task or may be an air file bug? Thanks by your help :-/

[MattNW]

Is this at all airports or just certain ones? If it's not at all airports then it sounds like a scenery problem if you are seeing puffs of dust. Probably a gap in the flattened areas. There's a huge bump at KIND on the taxiway. I've even had FS9 detect a crash when taxiing very fast.

[Kaworu]

That happens sometimes. If it does happen everywhere, the aircraft.cfg file is incorrectly configured.