What happened
During an ILS approach, the pilot detected an over-torque condition affecting the left engine. In response to the mechanical issue, the pilot executed a go-around and attempted a second approach with the left engine shut down. During this subsequent maneuver, the aircraft was unable to sustain its altitude and entered an uncontrolled descent. The aircraft eventually impacted two residential houses located roughly 6 miles from the airport. The accident resulted in three fatalities.
Findings
Post-accident inspections of the left engine identified that the drive shaft connecting the fuel control to the fuel pump had sheared at the plastic coupling. Investigations further determined that the twin bearings responsible for supporting the drive shaft had failed. This bearing failure caused the drive shaft to shift, which ultimately triggered the over-torque condition observed by the pilot during the initial approach.