What happened
On June 4, 2024, a pilot was conducting a proficiency check to extend their TMG class rating in a Diamond HK36 TS, registration SE-UVN. The flight took place near Othem airfield on the island of Gotland. During a landing exercise, the crew attempted a go-around at a low altitude. However, the aircraft failed to climb sufficiently and made contact with the ground, with the tailwheel striking first. The aircraft subsequently veered into an area of tall grass, causing the tail section to break away. There were no injuries to the two occupants.
The investigation
The Swedish Accident Investigation Authority (SHK) examined the flight preparations, the aircraft's technical state, and the environmental conditions. The investigation revealed that the aircraft's takeoff mass and center of gravity were outside of the permitted operational limits. Furthermore, the crew had not adequately assessed the condition of the landing site, as the initial reconnaissance was performed at too high an altitude. The investigation also noted that the pilot was partially blinded by the sun during the approach, which hindered the evaluation of the field.
Findings
Several contributing factors led to the accident. A primary issue was the lack of a clear communication plan regarding the handover of flight controls between the pilot and the examiner. This ambiguity led to a situation where both occupants believed the other was in control of the aircraft. Additionally, the aircraft's descent continued despite full power being applied, likely because the airbrakes remained in the deployed position during the go-around attempt. The unsuitable surface of the airfield, characterized by high grass, exacerbated the damage to the airframe during the excursion.