Carburetter Icing Again!

Jodel D117, G-BGTX

Report name:
Jodel D117, G-BGTX
Jodel D117
After takeoff from Shobdon Aerodrome, Herefordshire
Date of occurrence:
29 June 2009
General Aviation – Fixed Wing
After taking off from Runway 09, at a height of 350 ft, the engine lost power and began to run roughly. Due to unsuitable terrain ahead, the pilot initiated a 180o turn to land back on Runway 27. During the turn the pilot applied carburettor heat and changed fuel tanks, but with no effect on the rough running engine. He made a downwind flapless landing

The aircraft was, however, travelling with sufficient speed to allow the pilot to ‘hop’ over the fence, touching down in a fenced compound beyond. It was brought to a halt when it struck the fence on the opposite side of the compound. The pilot was uninjured. The cause of the loss of engine power has not been determined but the weather conditions for the day (temperature 24C and a dew point of 17 C) were conducive to moderate carburettor icing at cruise power/serious icing descent power. The pilot commented that the pre-takeoff application of carburettor heat may have been insufficient to clear any carburettor ice that may have formed during taxiing.

Carburettor  icing stops engines-keep saying it! If you are an instructor, start teaching it. Pulling it out for a few seconds on the pre take off vital actions checks that the heat works when we see an RPM drop but what we really want to find out is IS THERE ANY CARB ICING AROUND. Just take that little bit longer over this check, Minimum time in hot air = 15 secondsi

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