My opinion is this,

Since AMA is in Muncie and the gentleman is in another state, I first looked at the Federal laws concerning discrimination, the ADA. I couldn't find anything that appears to apply. And since other members here have stated that they fly with difibrillators, the AMA does not appear to have a policy , (yet) of disciminating against people with difibrillators. So if you do hire a lawyer to send a nasty-gram to the AMA, what would the lawyer threaten the AMA with? What is the AMA discriminating against ? Someone define it for me . I think they could easily defend themselves by simply saying the word "safety". True or not, that word works wonders in court.

And frankly, I have to believe this situation is temperary. I can't imagine the AMA would actually leave this man in a "non-solo" status. If he feels well enough to drive out to the field, he obviously feels well enough to fly.