On June 9, 1985, a Piper PA-32R-300 (registration N75063) was involved in an aviation accident near Melstone, MT. One person was killed. Investigators recorded the probable cause as: The pilot's inability to maintain control of the aircraft due to a medical emergency, specifically coronary artery disease and recent hemorrhage. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
The sole occupant experienced a medical event while maneuvering the aircraft in a steep left turn, leading to an uncontrolled descent behind terrain with no mechanical failure detected.
What happened
The aircraft was observed executing a left turn that transitioned into a steep dive. The flight path continued downward until the plane passed out of sight behind a hill. There were no further visual observations of the event before impact.
The investigation
Investigators examined the wreckage and operational records to determine the sequence of events. They found no evidence of airframe or engine malfunction or failure prior to the crash. The mechanical systems appeared intact, ruling out technical failure as a primary factor in the loss of control.
Findings
Medical examinations of the sole occupant revealed significant health issues. The pilot had 90 percent narrowing of both coronary arteries. Additionally, there was evidence of recent hemorrhage within the cardiovascular system. These medical conditions suggest a sudden incapacitation event during flight.
Probable cause
The pilot's inability to maintain control of the aircraft due to a medical emergency, specifically coronary artery disease and recent hemorrhage.
What happened in the 9 Jun 1985 Piper PA-32R-300 accident near Melstone, MT?
The sole occupant experienced a medical event while maneuvering the aircraft in a steep left turn, leading to an uncontrolled descent behind terrain with no mechanical failure detected.
Were there any fatalities in the 9 Jun 1985 Piper PA-32R-300 accident?
The accident was fatal, resulting in 1 fatality.
What aircraft was involved and where did it happen?
The accident on 9 Jun 1985 involved a Piper PA-32R-300, registration N75063, at Melstone, MT.
What was the probable cause of the accident?
The pilot's inability to maintain control of the aircraft due to a medical emergency, specifically coronary artery disease and recent hemorrhage.
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