History of the Flight
The aircraft, a Cessna U206C Super Skywagon registered G-BPGE, was conducting a parachute drop operation at Strathallen Airfield, Perthshire, with a pilot and five parachutists on board. The takeoff from grass Runway 28 was normal. After climbing to 2,000 ft above the airfield, the pilot released a wind drift indicator (WDI) and continued climbing while remaining near the airfield to observe it. The airspeed was stabilised at 100 kt, with propeller rpm at 2,500 and manifold pressure at 25 inches.
As the aircraft reached 3,000 ft, a sudden loss of engine power occurred accompanied by increased vibration. Oil appeared on the windscreen, but the pilot could still see through the left side. He adopted a glide approach for a power-off landing back on Runway 28 and instructed the parachutists to remain on board, considering it the safest option given their low altitude.
The aircraft touched down about halfway along the runway, leaving approximately 320 m remaining. Sensing difficulty stopping on the damp grass, the pilot turned right onto a strip of longer grass adjacent to the runway to increase deceleration. However, the aircraft overran the runway end, going through a fence and hedge before coming to a stop. The pilot and passengers, uninjured, exited through the main door without assistance.
Damage and Findings
The lower front cowling, propeller, strut fairings, and left side tailplane leading edge were damaged. An inspection of the engine revealed that the number five and six piston connecting rods had failed, creating holes in both the upper and lower crankcase, which allowed engine oil to escape.
The commander held a Commercial Pilot's Licence, was 55 years old, and had 666 total flying hours, with 132 hours on type.