What happened
On September 3, 1999, a Dassault Falcon 10, registration SE-DYB, was performing a private charter flight from Stockholm/Bromma to Östersund/Frösön F4 airport. During the visual approach to runway 30, the crew encountered significant turbulence and strong winds. While the reported wind was approximately 23 knots, the crew noted on their instruments that the wind had reached 50 knots from the southwest.
As the aircraft touched down, it bounced, prompting the co-pilot to push the control column forward. The aircraft then bounced again, specifically on the right main gear, and began an abrupt roll to the left. During this sequence, the aircraft swerved, and the commander extended the airbrakes. The left wingtip and aileron subsequently struck the runway, resulting in substantial damage to the aircraft. There were no injuries to the two crew members or the four passengers on board.
The investigation
The Swedish Accident Investigation Authority (SHK) examined the aircraft's flight data recorder and cockpit voice recorder, as well as meteorological and operational records. The investigation focused on the wind conditions at the time of the accident, noting that the wind measurement equipment for runway 30 was unserviceable due to ongoing construction work. This prevented the pilots from receiving accurate information regarding wind variations.
Investigators also reviewed the crew's operational procedures, including their use of checklists, phraseology, and the availability of landing charts. The investigation also looked into the mechanical operation of the aircraft's airbrakes and the impact of local terrain on wind patterns near the airport.