What happened
On Saturday, July 17, 1999, at 18:30, a Dyn'Aero CR 100 C (registration F-PFHC) was performing a private flight from Chalon Champforgeuil to Roanne. The flight was conducted under favorable weather conditions, characterized by calm winds, CAVOK visibility, and a temperature of 27 °C.
Prior to departure, the pilot conducted engine tests, which were completed without issue. However, as the aircraft accelerated through approximately 90 km/h during the takeoff roll, the engine stopped abruptly. The sudden loss of engine torque caused the aircraft to yaw significantly. In an attempt to counteract the rightward yaw, the pilot applied a violent correction to the left, which induced a ground loop. The aircraft sustained damage to the main landing gear, as well as the right wingtip and aileron.
The investigation
The investigation focused on the sudden loss of engine power during the takeoff phase. Investigators examined the fuel system to determine the cause of the engine stoppage. The analysis centered on the fuel delivery path, specifically looking for obstructions that could have interrupted the flow of fuel to the engine.
Findings
The investigation established that the engine failure was caused by the total blockage of the fuel sedimenter filter. Fine resin particles were discovered within the filter; these particles originated from a recent repair performed on the aircraft's right fuel tank. This contamination prevented sufficient fuel from reaching the engine, leading to the sudden loss of power during the takeoff roll.