What happened
On June 25, 2020, at approximately 13:00 UTC, a GROB G 115, registration OK-GRB, was involved in a runway excursion at Benešov Aerodrome (LKBE). The pilot was conducting solo flight training for precision landings under the supervision of an instructor positioned near the runway.
Following a second landing that resulted in a slight bounce, the pilot attempted to correct the aircraft's position by applying power and back pressure. However, the aircraft remained slightly off the runway centerline. As the pilot applied full power to initiate a go-around, the increased propeller torque, combined with the effects of a crosswind, caused the aircraft to veer sharply to the left. The pilot was unable to maintain directional control using the rudder, causing the aircraft to exit the left edge of RWY 06. At a speed of approximately 60–65 knots, the left wing struck a hay bale located within the runway safety area. The impact caused the aircraft to pivot left and come to a halt.
The investigation
The ÚZPLN investigation established that the pilot was fully qualified and medically fit, though possessing limited experience in precision landing maneuvers. The aircraft was airworthy and properly maintained. The investigation also noted that agricultural activities were underway at the aerodrome, and hay bales were being processed and moved throughout the area. The investigation confirmed that the wind conditions at the time did not exceed any operational limits.
Findings
- The pilot failed to sufficiently counteract the aircraft's tendency to veer left during the acceleration phase of the go-around.
- The primary cause was the pilot's inability to correct the aircraft's directional deviation caused by propeller torque and crosswind during the application of full power.
- Obstacles, specifically hay bales, were present within the runway safety area due to ongoing agricultural work.
- The impact with the hay bale resulted in extensive damage to the GROB G 115, including structural damage to the left wing, fuselage, and left landing gear, rendering the aircraft uneconomical to repair.