The aircraft was departed Guernsey on a flight to Norfolk. Whist climbing, smoke was detected in the cabin which became rapidly choking and thicker such that visibility reduced significantly. The pilot shut down the engine and turned towards the airport, intending to make a forced landing there. The aircraft struck a disused greenhouse approximately 0.5 nm short of the runway and the passenger suffered a serious back injury.
An engine exhaust pipe had fractured and the hot gases had burnt the glass-fibre cowling