What happened
On 18 September 2008, a Mainair Blade, registration G-CEGM, was performing a private flight from Huthswaite (Baxby) Airfield in Yorkshire. The aircraft was carrying one pilot and one passenger. Shortly after departing from the north-westerly grass runway, the engine lost power while the aircraft was at an altitude of approximately 25 feet. Due to the low altitude and the lack of remaining runway length within the airfield boundaries, the pilot was unable to complete a landing within the strip. The aircraft subsequently struck a hedge located at the end of the runway, causing substantial damage to the airframe. While no fire occurred despite significant fuel leakage, the pilot sustained serious injuries and required an air ambulance for transport to the hospital, while the passenger escaped with minor injuries.
The investigation
Investigators examined the engine and the fuel system to determine the cause of the power loss. The engine itself showed no signs of any mechanical defects existing prior to the accident. However, the investigation identified water within the carburettor, which was likely introduced during the period the wreckage was stored in the open before being collected. Additionally, a dark brown residue was discovered in the fuel filter, suggesting the presence of contaminants. The investigation also noted that during a previous flight to a different airfield, the pilot had partially refilled the tank using motor gasoline (mogues) of unidentified age and source.
Findings
- The loss of engine power was likely caused by fuel contamination.
- The fuel used in the aircraft was of an unknown origin and age.
- The runway surface was dry, mown grass and was sufficiently firm to support the aircraft's operation.
- The presence of water in the carburettor and residue in the filter pointed toward contaminated fuel as the primary factor.