Why would a pilot want to be a fake doctor oO, you already have a pretty cool and well paying job...
but some of his coworkers comments seem to indicate he actually knew what he was doing as a doctor, maybe an ufortunate case of someone who had the skills but just couldn’t get past the ‘book learning’ required to become an official doctor, sad end for someone of his years in any case.
The AP found he had no medical residency
Residency is not about "book learning." It's clinical experience, and residency usually lasts longer than medical school. I wouldn't want this guy with a superficial acquaintance with medicine working on a complex case of someone I cared for.