Narrative:

Prior to leveling off at cruise flight we accepted more direct routing via direct sgf. After reaching cruise altitude at FL350 and M.74 we entered what appeared to be a thunderstorm in the vicinity of tyr and encountered severe turbulence lasting approximately 10 seconds. Prior to entering; the conditions were mostly smooth and the seatbelt sign had remained on. Night VMC conditions confirmed the depiction of our weather radar with observed lightning in the distance along the right side of our course only. No lightning or other visual cues were observed in front of us on our current route of flight; nor was there any report from ATC of precipitation along our new direct routing. During the turbulence event there was one EICAS caution message for an autopilot mis-trim that immediately cleared after exiting the weather. Altitude deviations were within 300 feet and no airframe exceedances were noted; however the operating window on the airspeed tape did greatly narrow. A PIREP was made to ATC and captain made contact with the flight attendants and made an announcement to the passengers. All passengers were seated at the time with no passenger injuries reported to the crew. Both flight attendants reported hitting their heads while operating in the aft galley. One flight attendant fell to the floor and another flight attendant was injured on his side by a galley cart. Both pilots were seated with lap belts and were not injured. The flight attendants determined that they were able to continue to the scheduled destination of sdf; and so the flight proceeded without further incident.

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Original NASA ASRS Text

Title: Flight crew of a turbojet reported a brief severe turbulence encounter which resulted in two injured Flight Attendants.

Narrative: Prior to leveling off at cruise flight we accepted more direct routing via direct SGF. After reaching cruise altitude at FL350 and M.74 we entered what appeared to be a thunderstorm in the vicinity of TYR and encountered severe turbulence lasting approximately 10 seconds. Prior to entering; the conditions were mostly smooth and the seatbelt sign had remained on. Night VMC conditions confirmed the depiction of our weather radar with observed lightning in the distance along the right side of our course only. No lightning or other visual cues were observed in front of us on our current route of flight; nor was there any report from ATC of precipitation along our new direct routing. During the turbulence event there was one EICAS caution message for an Autopilot mis-trim that immediately cleared after exiting the weather. Altitude deviations were within 300 feet and no airframe exceedances were noted; however the operating window on the airspeed tape did greatly narrow. A PIREP was made to ATC and Captain made contact with the flight attendants and made an announcement to the passengers. All passengers were seated at the time with no passenger injuries reported to the crew. Both flight attendants reported hitting their heads while operating in the aft galley. One FA fell to the floor and another FA was injured on his side by a galley cart. Both pilots were seated with lap belts and were not injured. The flight attendants determined that they were able to continue to the scheduled destination of SDF; and so the flight proceeded without further incident.

Data retrieved from NASA's ASRS site 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.