Which Royal family member died in 1942?

Prince George, Duke of Kent.

He was killed in an air crash, on his way to inspect an RAF station. So it was officially classified as a patriotic death on wartime duty.

But there are some very persistent rumours that he was drunk, and had demanded to take over the controls, because his honorary rank was senior to the pilot's actual rank.

Supposedly a radio operator on the ground overheard parts of the argument, but was sworn to silence, under the laws of wartime censorship.