AAIB investigation to Kolb Twinstar MKIII (Modified SS), G-MZZT
Loss of control after takeoff and engine failure, Plaistows Farm, St Albans, 30 January 2022.
Summary:
As the aircraft took off it suddenly veered to the right and climbed very slowly, narrowly missing a person, a hangar, power cables and a farm building. At approximately 100 ft agl the engine stopped, and the aircraft struck the ground. The pilot suffered back injuries and reported that he had been unable to control the aircraft due to a control restriction.
No evidence of a control restriction was found, and it is considered that flight just above the stall speed, resulting in a poor response from the flying control surfaces, was the probable cause of the control issues experienced by the pilot. The engine stopped due to overheating of the rear cylinder, but no cause could be found for this.
The general condition of the aircraft was poor, and no evidence could be provided by the pilot to confirm regular maintenance. Owners of Single Seat Deregulated (SSDR) aircraft are reminded of their legal responsibility to comply with the Air Navigation Order (ANO). The British Microlight Aircraft Association (BMAA) and Light Aircraft Association (LAA) have published guidance to assist with this.
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