What happened
On June 18, 2017, a pilot was conducting a training flight sequence at Brno-Medlánky Airport (LKCM) in an Orlik II - VT 116, registration OK-4307. The flight was part of a retraining program that included a check flight in an L-23 glider and a familiarization flight in the Orlik II - VT 116.
During the final approach to runway 34, the pilot maintained a higher approach speed of approximately 95 km/h to account for a headwind. Upon touchdown, the aircraft experienced an initial bounce. In an attempt to correct this, the pilot applied excessive elevator pressure and braking. This input, influenced by habits developed on different glider types, caused the aircraft to enter a sharp descent. The pilot reacted reflexively by pulling back on the controls, which triggered a second bounce. This second bounce led to a loss of airspeed and a subsequent sink. On the third bounce, the aircraft struck the ground heavily on its skid, causing significant damage to the wooden structure of the rear fuselage near the vertical stabilizer.
The investigation
The ÚZPLN investigation was based on the pilot's statements and a physical examination of the aircraft. The investigation confirmed that the pilot was qualified and the aircraft held a valid special airworthiness certificate. The aircraft's wooden construction, specifically the tail section, was found to be broken and required repair by an authorized maintenance organization. The investigation also noted that the pilot's approach speed was higher than the standard range of 85–95 km/h due to the wind conditions.
Findings
- The pilot chose to increase the approach speed based on their assessment of the landing requirements.
- The initial bounce occurred due to the higher touchdown speed.
- The pilot's corrective actions—specifically the use of elevator and brakes—were inappropriate due to the transfer of handling habits from other glider types.
- The sequence of bounces increased in amplitude, ultimately leading to the heavy impact on the skid.