What happened
During a night flight in instrument meteorological conditions (IMC), the crew experienced an engine fire while performing a missed approach. In response to the fire, the pilots feathered the propeller and shut down the affected engine.
While attempting an approach to another airport, the aircraft touched down short of the runway. The plane traveled onto the runway before eventually departing the left side of the paved surface. The pilot reported that the aircraft was unable to maintain altitude because of ice accumulations and a lack of available power following the engine shutdown.
The investigation
An examination of the wreckage showed rotational damage to both engines and propellers, which is consistent with the engines being in operation at the time of impact. Investigators found that neither propeller was in the feathered position during the accident.
Findings
The pilot had been briefed regarding known moderate icing conditions and isolated instances of severe icing. According to the aircraft flight manual (AFM), a minimum speed of 140 knots is recommended when operating in icing conditions; at speeds below 140 knots, ice can accumulate on unprotected areas of the wings. The pilot reported flying the approach at 114 knots.