Quote Originally Posted by Rjk View Post
wasn't the crash ultimately attributed to a carbon monoxide leak in the cabin, or am I misremembering? the pilots ability in the dark might not have been a factor at all if he wasn't conscious.
Yes, you are correct although recordings said he was already panicking and asking permission to fly around and below the cloud/fog/rain before the sudden rapid descent which broke the plane up before crashing into the sea.

The investigation said he had lost his instrument reading license for over two years that the skill and knowledge would be perishable within that time frame, and that he had only been flying in clear conditions during the daytime before the fatal flight.