Aeronca 7AC Champion G-BVCS, 6 August 2006
Aeronca 7AC Champion, G-BVCS
Summary:
After takeoff, at approximately 100 ft aal, the aircraft鈥檚 engine lost some power. 皇冠体育app pilot retarded the throttle slightly before opening it fully. Full power was regained and the climb was continued. At approximately 300 ft aal the engine lost all power and stopped. 皇冠体育app pilot flew a forced landing into a field of wheat on the airfield. During the landing roll the aircraft鈥檚 main landing gear collapsed. 皇冠体育app temperature was 27潞 C and the dew point was 14潞 C. Testing of the aircraft鈥檚 engine and fuel system after the accident revealed no pre-existing damage and no mechanical reason as to why the engine failed. 皇冠体育app aircraft鈥檚 magnetos were subsequently sent to an independent maintenance organisation for testing. Under test one magneto stopped when it got up to operating temperature due to leaking insulation. 皇冠体育app other showed signs of failure before stopping. 皇冠体育appse results imply that the most probable cause of the engine failure was a double magneto failure. Given the high ambient temperature it is likely that the magnetos achieved a high operating temperature soon after take off prior to the failure of one followed by the other.
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