The NTSB released final reports this month saying two fatal crashes of home-build aircraft involved incapacitated pilots following cardiovascular events. Both pilots had previously been issued medical certificates, which had subsequently expired. In both cases, the pilots had histories of severe coronary artery disease, which may have precluded reissuance of 3rd Class Medical Certificates. Both aircraft were eligible to be flown by pilots under light sport medical certification rules without an FAA Medical Certificate due to their relatively low speeds and maximum certificated weights.
This is a companion discussion topic for the original entry at https://www.avweb.com/news/ntsb-cites-medical-issues-in-light-aircraft-crashes