Narrative:

While cruising at FL340 we encountered continuous light chop. I turned the seat belt sign on; made an announcement; and then immediately made another announcement seating the flight attendants. Approximately 1-2 mins later we experienced severe turbulence lasting approximately 5 seconds. After about another min or so of continuous light turbulence we encountered another 5 seconds or so of severe turbulence. After that the ride improved significantly; and smoothed out in about 10 mins. Several flight attendants were injured; mostly in the flight attendant crew rest facility; and 4 passenger were injured: among them; one was in the lavatory and hit her head and cut her leg; another was struck by a carryon bag that fell out of the overhead bin.

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Original NASA ASRS Text

Title: A B747-400 OVER THE PACIFIC ENCOUNTERED SEVERE TURBULENCE RESULTING IN INJURIES TO SEVERAL FLIGHT ATTENDANTS. THE SEAT BELT SIGN WAS ON AT THE TIME.

Narrative: WHILE CRUISING AT FL340 WE ENCOUNTERED CONTINUOUS LIGHT CHOP. I TURNED THE SEAT BELT SIGN ON; MADE AN ANNOUNCEMENT; AND THEN IMMEDIATELY MADE ANOTHER ANNOUNCEMENT SEATING THE FLT ATTENDANTS. APPROX 1-2 MINS LATER WE EXPERIENCED SEVERE TURB LASTING APPROX 5 SECONDS. AFTER ABOUT ANOTHER MIN OR SO OF CONTINUOUS LIGHT TURB WE ENCOUNTERED ANOTHER 5 SECONDS OR SO OF SEVERE TURB. AFTER THAT THE RIDE IMPROVED SIGNIFICANTLY; AND SMOOTHED OUT IN ABOUT 10 MINS. SEVERAL FLT ATTENDANTS WERE INJURED; MOSTLY IN THE FLT ATTENDANT CREW REST FACILITY; AND 4 PAX WERE INJURED: AMONG THEM; ONE WAS IN THE LAVATORY AND HIT HER HEAD AND CUT HER LEG; ANOTHER WAS STRUCK BY A CARRYON BAG THAT FELL OUT OF THE OVERHEAD BIN.

Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.