What happened
On May 3, 2019, a private flight departing from Grenå Airport (EKGR) for Anholt (EKAT) resulted in the destruction of a Grumman AA1-B, registration OY-CLH. During the takeoff roll on runway 01, the pilot noted significant crosswinds and observed hail beginning to fall. While the pilot initially maintained the takeoff, the aircraft struggled with directional control along the runway. Immediately after liftoff, while at a low altitude, the aircraft experienced a sudden and uncontrollable roll to the right. The right wingtip struck the runway surface, causing the aircraft to crash near the eastern edge of the runway. The pilot was able to evacuate the aircraft without serious injury.
The investigation
The Danish Accident Investigation Board examined the meteorological conditions, the aircraft's technical state, and the pilot's decision-making. Investigators analyzed wind data from nearby stations and the airport's windsock, which indicated high wind speeds. The investigation also reviewed the aircraft's maintenance records and cockpit configuration. It was noted that while the aircraft's technical condition and weight and balance were within limits, the cockpit lacked a required placard stating the maximum crosswind limit. Furthermore, the investigation found that the pilot's medical certificate had expired prior to the accident.
Findings
- The primary cause of the accident was severe and gusty crosswind conditions that significantly exceeded the aircraft's maximum demonstrated crosswind limit of 16 knots.
- The intensity of the wind gusts made it impossible for the pilot to maintain control or correct the aircraft's attitude after liftoff.
- The pilot's decision to proceed with the takeoff despite observing high crosswinds and active hail was questionable.
- A required cockpit placard indicating the crosswind limitation was not installed, which may have impacted the pilot's situational awareness.