I have just tried to fly the Dash 8-400 out of Florence LIRQ, however the nose gear starts to bounce then collapses after a few hundred feet, I have tried several times from either end of the runway with the same result. I have found out what the problem is, it is due to the runway surface which is Macadam and the Dash 8 does not like Macadam. I have used AFCAD to change the surface to Concrete and now the Dash 8 takes off fine. Hope this helps a few pilots who fly into Florence, as the gear will also collapse on landing if the runway surface is not changed.