"Old guy crashes airplane" is a somewhat common occurrence that leads to obvious question if they really should have passed their medical. There's a tendency to not want to be the one to say no, especially if you've known the doctor signing the forms for decades... or if you were a fricken astronaut.
https://en.wikipedia.org/wiki/Beechcraft_T-34_Mentor#Civilia...
I hope to be 91 myself one day - nevertheless, I remain suspicious.
From the Los Angeles Times, 1988 <http://articles.latimes.com/1988-12-08/news/vw-1384_1_speake...>:
>Woody Allen was once asked what he would like people to say about him 100 years from now. He said: "I would like them to say, 'He looks good for his age.'"
not screaming in terror like his passengers.