What happened
On September 25, 2004, a Robin DR 400-160, registration F-GKIM, was performing a local flight at Romorantin aerodrome. During the takeoff roll on the unpaved section of runway 05 right, the pilot attempted to depart using a specific alignment point. After accelerating to approximately 2,200 RPM and releasing the brakes, the aircraft rotated at 110 km/h after a ground roll of about 250 meters.
As the aircraft climbed, it failed to gain sufficient altitude, covering only about three-quarters of the runway length. Fearing the aircraft would strike the aerodrome perimeter fence, the pilot executed a left turn to attempt an emergency landing. During this maneuver, the right main landing gear struck the ground with significant force, causing it to penetrate the upper surface of the wing. The aircraft eventually came to a stop in the grass between two unpaved runways. There were no fatalities among the four occupants, though the aircraft sustained heavy damage.
The investigation
The investigation examined the aircraft's configuration, weight and balance, and the pilot's decision-making process. The aircraft's mass of 945 kg and its center of gravity were found to be within manufacturer limits, with the weight and balance calculations verified by the chief pilot. The flaps were set to the first notch for takeoff, and the trim was in the neutral position.
Investigators also reviewed the meteorological conditions, which included a wind from 290 degrees at 6 to 12 knots, and the runway geometry. A witness on the ground noted that the aircraft exhibited a significant pitch-up attitude immediately upon rotation. The investigation also noted that while the pilot typically uses the paved portion of the runway, the takeoff in this instance began on the unpaved strip.
Findings
The investigation established that the accident was caused by a combination of pilot errors during the takeoff phase. Specifically, the pilot applied inappropriate elevator trim/dosage, which contributed to the excessive pitch-up attitude observed during rotation. Additionally, the pilot misjudged the wind direction, estimating a left crosswind of five to ten knots, and selected an unsuitable alignment point for the takeoff roll.