If you guys are interested in stuff like this look into John Denver’s death. It had to do with crashing a homemade airplane he bought with a very oddly placed fuel selector valve. The valve wasn’t supposed to be there and he was planning on moving it to its specified location. Plus he took off without refueling but that wasn’t a factor. There was a decent amount in it.

He didn’t have his medical because he admitted to a doctor he had 2-4 drinks per week and the FAA found out and revoked his license. He had only flown the plane a few times so he wasn’t used to the fuel selector valve or the plane in general. It was his fault overall though. He basically inadvertently crashed because he pressed the right rudder too far after unbuckling because he had to to reach the valve located to the left above and behind him. This led to a quick loss of control and crash into water not far from land.