Incident Details
The captain of an international flight reported that while climbing through 30,000 feet (flight level 300), the aircraft encountered moderate clear air turbulence. The encounter was brief in duration. At the time, the seat belt sign was illuminated, and passengers were seated as required. Both the captain and the first officer had been monitoring the weather radar during the climb, and they observed no weather anomalies. Furthermore, no turbulence had been forecast for the area of the encounter.
Cabin Crew Situation
There were three flight attendants on duty in the cabin. All were engaged in their regular duties when the unexpected turbulence occurred. One flight attendant, who was working in the aft galley, sustained an injury to her foot. The injury resulted in a bone fracture. No other injuries or damage were reported in the source.
Summary
The event involved moderate clear air turbulence at FL300 while climbing. Weather radar did not show any anomalies, and no turbulence forecast existed. A flight attendant suffered a foot fracture. The seat belt sign was on, and passengers were seated.