high profile accident that had little to do with the co pilots total time and a lot to do with the training of the captain and the trainers and mangers at Colgan that let him slip through.
In the Colgan mishap the weather sucked and procedures and known techniques were not followed. How many hours does it take to know the weather was bad, and the approach wasn't being flown accurately or procedure knew were not being followed? The co-pilot had all the experience she needed to know those things. She lacked judgment and assertiveness. The Captain was even more handicapped. In any case, it had nothing to do with hours. It is about judgment. Whether military or civilian, some guys some times make a bad judgment call. That is when safety is compromised. Not when a 1800 hour civilian sourced pilot steps onto the flight deck.
The co-pilot had little to do with the mishap, but at the same time you ask how many hours does it take to know the weather was bad, or that the approach and procedures weren't being flown properly... I guess the answer is, more..?.. Enough so that the CVRS doesn't pick up the co-pilot saying she's never flown in weather like that (really! you're operating an aircraft in the upper upper midwest in the winter and are unfamiliar with poor weather techniques and procedures - to the point that you can not correct a flailing/failing captain...?).
I stand by my point that 1800 hours of mil time (particularly single piloted time around a ship - I know, I know - the blasphemy) demonstrates greater skill, greater decision making skill, greater flexibility, and greater judgement than just about anything walking away from an FBO.