What happened
Shortly after departing, the pilot of the aircraft notified air traffic control regarding an unspecified engine issue. While a ground observer noted smoke trailing from the left engine, the engine appeared to be functioning normally without any audible misfire. When the tower controller offered assistance, the pilot declined. The controller subsequently cleared the aircraft for left traffic and provided weather updates, but no further communication was received from the cockpit.
Radar analysis indicated that the aircraft entered a left downwind pattern, leveling off at 1,400 feet MSL and 156 knots. Over the subsequent 14 seconds, the aircraft descended to 1,100 feet while accelerating to 173 knots, at which point radar contact was terminated. Eyewitnesses reported seeing the plane perform a right snap roll and a left wingover before entering a steep dive into the ground. The accident resulted in 1 fatality.
Findings
Investigations into the wreckage revealed the plane had recently undergone maintenance. During that period, excess oil was discovered in the left engine cowling, which the pilot had previously admitted to spilling. Additionally, the pilot had added 3 quarts of oil to the left engine following the maintenance session. It was noted that the engine oil dipsticks were calibrated differently, with the right engine dipstick reading 1 3/4 quarts lower than the left.
Technical examinations of the fragmented wreckage showed no signs of engine failure, detonation, or mechanical defects. There was also no evidence of an extreme out-of-trim condition or pre-impact mechanical failure. The pilot, an airline transport pilot with 3,210 total flight hours, was performing his first solo flight in this specific model following the maintenance trip. While an autopsy identified prostate adenocarcinoma, the pilot's physician stated the condition was unknown to him.