What happened
On November 10, 2021, a Rolladen Schneider LS4 glider, registration LV-ENW, was participating in a regional soaring championship. The flight involved a three-point course covering a total distance of 195 kilometers. While flying through the final leg of the course at an altitude of approximately 560 meters, the pilot encountered deteriorating meteorological conditions that were no longer suitable for continued soaring.
After checking a nearby area at 400 meters to see if any lift could be found, the pilot decided to execute a landing in a field where another glider had already safely landed. During the final phase of the approach, the aircraft struck an electrical power line. Following the impact, the pilot managed to complete the landing in the intended field. The collision resulted in one serious injury to the pilot and caused damage to the aircraft's cockpit canopy.
The investigation
The investigation analyzed flight recorder data, which confirmed the pilot's decision-making process regarding the weather and the landing site. Investigators examined the aircraft's airworthiness status and found that LV-ENW held an experimental certificate of airworthiness specifically for exhibition purposes, which differed from the type of flight being performed during the competition.
Efforts were made to clarify the operational limitations of this certificate with the National Civil Aviation Administration (ANAC). However, while some information was provided, the authority did not respond to specific inquiries regarding why the aircraft was certified for exhibition rather than for the type of flight involved in the accident.
Findings
- The pilot failed to detect the electrical wires crossing the flight path.
- The impact with the power lines occurred at the level of the cockpit.
- The decision to land in the selected field was consistent with standard competition procedures, as the pilot was responding to unfavorable weather conditions.
- The aircraft's airworthiness certificate purpose did not align with the actual operation being conducted.
Safety action
- The investigation highlighted the necessity for the National Civil Aviation Administration to provide timely responses to information requests from the JST to ensure thorough investigations and the development of effective safety recommendations.