John J. Shaffer was 56 when he vanished from Penn Yan, New York, after taking off from Penn Yan Airport on September 28, 1984. He departed in a privately owned 1965 Cessna Model 150, tail number N4245U, described as green and silver with a single propeller. There were no communications from Shaffer after takeoff and no wreckage of the aircraft has ever been found.

The disappearance centers entirely on that final flight from the regional airport in Yates County. No debris, emergency signals, or subsequent sightings have been reported, leaving investigators and the family with virtually no physical leads. The search for a small aircraft that could have gone down in remote terrain has been a major obstacle to resolving the case.

What can readers who lived in the area or who flew locally in late September 1984 add about that flight, the plane, or any unusual sightings that day?