What happened
On May 8, 2009, a Robin DR400-120, registered F-GJZO, was performing a local flight circuit at Avranches aerodrome. During the landing phase on unpaved runway 22, the aircraft experienced a stall during the flare. The impact with the ground was violent, causing the landing gear to collapse and resulting in the aircraft veering off the right side of the runway.
Prior to departure, the pilot observed a squall line approaching from the west. Although the pilot experienced several moments of hesitation regarding the deteriorating weather, they decided to proceed with the 30-minute flight. Throughout the circuit, the aircraft encountered significant turbulence. The pilot chose to land before the squall line arrived rather than waiting for the weather to clear.
The investigation
The investigation focused on the pilot's decision-making process and the meteorological conditions at the time of the accident. Investigators noted that while the pilot observed unfavorable weather, they did not seek advice from an instructor present at the aeroclub, as the instructor was busy conducting a flight with a student. Additionally, while other pilots were present at the club, none offered specific warnings regarding the wind conditions.
At the time of the accident, winds were recorded at 260 degrees with speeds between 10 and 15 knots, but gusts were significantly higher, reaching 25 to 30 knots. The pilot's intent was to gain experience in handling strong wind conditions.
Findings
- The primary cause of the accident was the decision to proceed with the flight despite unfavorable meteorological conditions.
- The aircraft sustained heavy damage as a result of the landing gear collapse and subsequent excursion.
- The pilot's desire to gain experience in turbulent conditions contributed to the decision to fly despite the approaching squall line.