What happened
On 15 July 2003, a modified Piper PA-20 Pacer, registration G-BFMR, was returning to Headcorn Aerodrome in Kent following a flight from a farm strip. The pilot initiated a straight-in approach for Runway 11 at 2,000 feet, utilizing a full left sideslip to manage the descent while maintaining enough power to prevent engine shock cooling. The aircraft touched down normally just past the runway threshold.
After taxiing along the runway at a relatively high speed, the pilot decided to perform another circuit. Upon advancing the throttle for the takeoff, the aircraft climbed to approximately 50 feet before the engine ceased operation. The pilot attempted an emergency landing in a small field located at the far end of the runway. During this maneuver, the undercarriage struck a large electric fence, causing the aircraft to stop abruptly within a distance of roughly 10 feet. The pilot sustained minor injuries, while the passenger remained unhurt. Both occupants were able to exit the aircraft without help.
The investigation
The investigation focused on the sudden loss of engine power during the initial climb. The pilot reported that the fuel supply to the engine had been interrupted. Because the aircraft was using the left wing tank for the approach, the prolonged left-hand sideslip caused the fuel collector in that tank to become uncovered. This allowed air to enter the fuel system. As the aircraft taxied and began its climb, the air reached the engine after the remaining fuel in the lines and carburettor had been exhausted. It was noted that this specific Piper PA-20 Pacer model lacks a header tank between the fuel tanks and the engine, which might otherwise have mitigated the effect of fuel starvation.