What happened
During a flight near the Hawaiian Islands, the captain anticipated moderate turbulence due to active frontal system activity. To prepare for these conditions, the captain briefed the flight attendant regarding expected turbulence for the duration of the flight and maintained the illumination of the seatbelt sign continuously.
The aircraft encountered turbulence throughout much of the flight. While operating under radar vectors for an LDA Runway 2D6L approach to Honolulu, the crew descended to 7,000 feet, navigating toward a clear area identified between storm cells on both the aircraft and approach control radars.
After several minutes without encountering turbulence, the flight attendant began a passenger seat belt compliance check. As the attendant was returning to her seat in the rear of the aircraft, the plane experienced three strong jolts accompanied by altitude excursions. During this period of turbulence, the flight attendant was bounced off the ceiling twice, resulting in a displaced fracture of her left ankle.