What happened
On July 12, 2015, at approximately 15:07 local time, a Schleicher K8B glider, registration OK-6221, was performing solo circuit training at Hosín Airfield (LKHD). The pilot, a 35-year-old student, had previously completed a successful training flight with an instructor earlier that day and had performed five successful solo circuits prior to the accident.
During the sixth solo circuit, the pilot attempted to land. As the aircraft reached the flare phase, a slight float occurred. In response, the pilot applied the air brakes. This action, combined with excess speed, caused the glider to climb to an altitude of approximately 2 to 3 meters. Upon reaching the peak of this climb, the pilot released the air brakes, which resulted in a sudden loss of airspeed and a subsequent heavy sink rate. The aircraft struck the ground with its nose, resulting in damage to the fuselage structure.
The investigation
The ÚZPLN investigation examined the pilot's training progress, the aircraft's maintenance status, and the meteorological conditions at the time of the occurrence. The investigation established that the weather was favorable, with visibility exceeding 10 km and light winds. The aircraft was found to have a valid airworthiness certificate and all required insurance.
Findings
- The primary cause of the accident was the incorrect use of air brakes by the pilot during the flare, which led to an uncontrolled descent and a hard landing.
- The pilot's reaction to the initial float—applying air brakes while maintaining excess speed—caused an unintended climb.
- The subsequent release of the brakes at the top of the climb caused the glider to drop abruptly.
- The pilot held valid medical and pilot qualifications for the flight.