What happened
On September 16, 2006, an Issoire Aviation APM 20 (registration F-GRRK) was performing a training circuit at Rethel aerodrome. Following a successful initial touch-and-go, the pilot attempted a second maneuver on unpaved runway 24. During the approach, the aircraft maintained a speed between 60 and 65 knots with flaps set to 25 degrees. The main landing gear touched down mid-runway at approximately 50 knots.
Upon touchdown, the pilot applied increased power to initiate the takeoff. During the acceleration, the aircraft veered sharply to the left, encountering a dust cloud kicked up by agricultural machinery working in a nearby field. The pilot responded by retracting the flaps to 12 degrees and adjusting the carburetor heat, while successfully correcting the flight path. Despite the engine parameters remaining normal, the aircraft failed to lift off. The crew heard the stall warning as the nose wheel lifted at 54 knots. The pilot attempted to correct the situation by pushing the control column forward to lower the nose and then pulling back more firmly with full power, but the aircraft remained on the ground.
As the aircraft passed the threshold of the intersecting runway 06, the instructor decided to abort the takeoff. The instructor took control of the aircraft and managed to bring it to a stop approximately ten meters beyond the end of the runway, resulting in damage to the main landing gear covers.
The investigation
The investigation focused on the flight parameters and the decision-making process during the takeoff roll. Investigators reviewed the aircraft's weight and balance, confirming the mass of 614 kg and the center of gravity were within manufacturer limits. Engine tests performed after the incident revealed no mechanical anomalies. The investigation also examined the aircraft's performance capabilities on the specific runway conditions, noting the 0.65% uphill gradient and the dry, unpaved surface.