Amateur-built RV 6A N216LA accident near Bon Aqua, Tennessee

Probable cause

The pilot's incapacitation from complications of a recent heart attack, which resulted in a loss of control during cruise flight.

NTSB analysis

During the cruise portion of a cross-country flight, about 20 minutes after takeoff, the commercial pilot stopped responding to air traffic controllers as the airplane reversed course. It then climbed from 6,500 ft to 9,000 ft mean sea level and completed two left circuits before descending rapidly into the ground. Examination of the wreckage did not reveal any preimpact mechanical malfunctions. The pilot's autopsy revealed that he had severe coronary artery disease, scarring from previous heart attacks, and evidence of ongoing or recent damage to two new areas of heart muscle, indicating recent heart attacks. All of these conditions put him at risk of experiencing acute heart failure or a disturbance of heart rhythm (arrhythmia). Both acute heart failure and arrhythmia can rapidly lead to decreased consciousness due to low blood pressure. It is likely that acute symptoms from complications of the pilot's ongoing heart attacks resulted in impairment /incapacitation of the pilot and led to his loss of airplane control.

Text from the NTSB. Open the NTSB docket for ERA15FA336 for the full record.