Casualties unknown

Pilot's Autopsy Reveals Cardiac Conditions After Runway 33 Approach Crash (N9829R)

Romeo, MI, US

On April 5, 1990, a Beech M35 (registration N9829R) operated by John E. Singer was involved in an aviation accident near Romeo, MI. Investigators recorded the probable cause as: A LOSS OF CONTROL DUE TO PHYSICAL INCAPACITATION (HEART ATTACK). This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-10Data APIEditorial standards

The pilot of an airplane on base leg for Runway 33 reported a twin Cessna holding on Runway 36. No further transmissions were received, and the airplane crashed one-quarter mile from the approach end. Autopsy revealed advanced coronary artery disease and a recent coronary artery occlusion.

Incident Report

The pilot was flying an airplane on a base leg approach for Runway 33. During the approach, he transmitted that he saw a twin Cessna aircraft holding on Runway 36. After that transmission, no further communications were received from the airplane. The airplane crashed and was found one-quarter mile from the approach end of Runway 33. An autopsy performed on the pilot revealed that he had far advanced calcific atheromatosis of the coronary arteries, a recent occlusive thrombosis of the left anterior descending coronary artery, and a history of cardiac arrhythmia. The calcific atheromatosis is a condition characterized by hardening and narrowing of the arteries due to calcium deposits. The thrombosis involved a blood clot that had recently occluded the left anterior descending coronary artery, a critical vessel supplying blood to the heart. The pilot's documented history of cardiac arrhythmia indicates pre-existing irregular heartbeats.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X22873. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.