What happened
On December 15, 2020, a private flight intended for a family lunch ended in a fatal accident near Kekerengu, north of Kaikoura. The pilot was operating an EC120-B helicopter, registration ZK-HEK, transporting family members and a friend from Rangiora to a seaside café.
As the helicopter approached the beach for a second low-level pass, it began a left turn toward the landing area. During this maneuver, the aircraft's airspeed dropped significantly. Witnesses at the nearby café observed the helicopter begin to spin uncontrollably to the left. The aircraft descended rapidly and struck a stony beach near the low-tide mark. While the three children on board survived with moderate to serious injuries, the pilot and one adult passenger were killed in the impact.
The investigation
Investigators examined the aircraft's flight path using GPS and tracking data, as well as video footage captured by witnesses. The investigation confirmed that the weather conditions were favorable, with a light to moderate northeasterly breeze and clear visibility.
Technical analysis of the engine performance data, retrieved from the aircraft's VEMD by French authorities, showed no engine malfunctions or power exceedances prior to the crash. The investigation also reviewed the pilot's background, noting that while the pilot held a valid private license, they had relatively limited experience, with only 170 total flying hours and just 32 hours specifically on the EC120-B model. The aircraft's maintenance records were found to be up to date, and the weight and balance of the flight were within approved limits.
Findings
- The helicopter's groundspeed dropped to approximately 25 knots during the tightening left turn.
- The combination of low airspeed and increased power demand during the maneuver caused the aircraft to uncontrolledly yaw to the left.
- The pilot failed to recognize the visual cues indicating the aircraft was losing performance during this critical phase of flight.
- The pilot's limited flying experience was a primary contributing factor to the inability to manage the developing loss of control.