Airbus Helicopters Inc AS350B3 N21FY accident near Palmer, Alaska

Probable cause

The pilot's failure to maintain clearance from snow-covered terrain during the landing approach in flat light conditions.

NTSB analysis

The pilot stated that while on approach to land at a remote, snow-covered glacial site, with flat light conditions present, he lost “positive” visual reference, but believed he was in a stable hover. Subsequently, the left landing gear skid contacted the snow-covered terrain, and the helicopter entered a dynamic rollover to the left, resulting in substantial damage to the fuselage, tail boom, and powertrain system. The pilot reported that there were no preaccident mechanical malfunctions or anomalies that would have precluded normal operation.

Text from the NTSB. Open the NTSB docket for ANC24LA009 for the full record.