Accident Overview
The pilot of a multi-engine aircraft reported that the right engine was losing oil while climbing to cruise altitude. In response, the pilot secured the engine and feathered its propeller. The pilot then maneuvered the aircraft to return to the departure airport, trimming it for single-engine operation and extending the main landing gear.
Loss of Power on Approach
During the approach phase, the operating left engine failed to develop full power. The pilot communicated to air traffic control that the aircraft would be unable to reach the intended airport.
Descent and Impact
The aircraft continued its emergency descent, impacting trees and descending uncontrollably through a densely wooded area. A fuel tank ruptured during this uncontrolled descent, leading to a fire and explosion. The aircraft continued to burn after it impacted the ground.
Post-Accident Examination
Both engines were disassembled, and numerous mechanical anomalies were identified. The engines had recently undergone overhaul, and this flight was the first since those overhauls. The pilot, who was the sole occupant and owner of the aircraft, was en route to sell it when the accident occurred. The pilot was killed.
Probable Cause
The probable cause, as determined by the official findings, was the pilot's operation of the aircraft with known deficiencies in equipment. Factors included the improper overhaul of the engines by other maintenance personnel, resulting in oil loss, deteriorated engine performance, and unsuitable terrain.