The pilot of a sightseeing helicopter that crashed off the Hawaiian island of Kauai last month has provided investigators with details about the aircraft's final moments before the fatal accident that killed three passengers.

According to the pilot's account to investigators, the helicopter experienced a series of intense vibrations before entering a spin and subsequently crashing during the tour flight. The pilot survived the incident and was able to provide testimony about the sequence of events leading to the crash.

The accident occurred during what was described as a sightseeing flight operation off Kauai. Three passengers aboard the helicopter were killed in the crash, while the pilot's survival has allowed investigators to gather firsthand accounts of the mechanical issues that preceded the accident.

Investigators are continuing to examine the circumstances surrounding the crash, including the reported vibrations and spinning motion described by the pilot. The investigation will likely focus on determining the underlying cause of the mechanical problems that led to the loss of control.

Tour helicopter operations are common in Hawaii, providing aerial sightseeing experiences over the islands' scenic landscapes. Safety investigations of such incidents typically examine factors including aircraft maintenance, weather conditions, and mechanical failures to determine the cause of accidents.