|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1801 To 2400|
|Locale Reference||navaid : zzz.vortac|
|Altitude||msl single value : 34000|
|Controlling Facilities||artcc : zzz.artcc|
|Operator||common carrier : air carrier|
|Make Model Name||B737-300|
|Operating Under FAR Part||Part 121|
|Navigation In Use||other|
|Flight Phase||cruise : level|
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Affiliation||company : air carrier|
|Function||flight crew : first officer|
|Anomaly||altitude deviation : excursion from assigned altitude|
cabin event : passenger illness
cabin event other
inflight encounter : turbulence
|Independent Detector||other flight crewa|
other flight crewb
|Resolutory Action||flight crew : exited adverse environment|
flight crew : regained aircraft control
flight crew : declared emergency
|Problem Areas||Cabin Crew Human Performance|
Flight Crew Human Performance
Passenger Human Performance
At approximately FL340; radar indicated a line of thunderstorms 160 NM ahead running about 120 mi north and south. I requested and was cleared for a 10-15 degree left deviation for storm avoidance. There was a 20 NM break between the main line of returns and the southernmost cell; and I decided to fly through the gap. About 20-30 mins prior to the encounter; I illuminated the seatbelt signs and advised the passenger of potential turbulence. The flight attendants were advised via intercom to prepare the cabin for potential moderate turbulence and to be seated. Approximately 2/3 through the break we encountered approximately 10 seconds of severe turbulence with a right 30-40 degree descending roll (1000-1500 FPM). During this time the autoplt reverted to control wheel steering and the first officer manually resumed control while I requested and received clearance to FL320. A few seconds later we were clear of clouds in smooth air. Following the event; I communicated with ATC; flight attendants and dispatch. Flight attendants advised that 1 passenger; not wearing seatbelt; was injured with bruised head and neck area. Injured passenger attended by passenger rn and emt.
Original NASA ASRS Text
Title: A B737-300 CREW ENCOUNTERED SEVERE TURB 10 NM FROM TSTM CELLS AT FL340. A PAX IS INJURED DURING TURB ENCOUNTER; WHILE NOT WEARING SEATBELT. EMER DECLARED.
Narrative: AT APPROX FL340; RADAR INDICATED A LINE OF TSTMS 160 NM AHEAD RUNNING ABOUT 120 MI N AND S. I REQUESTED AND WAS CLRED FOR A 10-15 DEG L DEV FOR STORM AVOIDANCE. THERE WAS A 20 NM BREAK BTWN THE MAIN LINE OF RETURNS AND THE SOUTHERNMOST CELL; AND I DECIDED TO FLY THROUGH THE GAP. ABOUT 20-30 MINS PRIOR TO THE ENCOUNTER; I ILLUMINATED THE SEATBELT SIGNS AND ADVISED THE PAX OF POTENTIAL TURB. THE FLT ATTENDANTS WERE ADVISED VIA INTERCOM TO PREPARE THE CABIN FOR POTENTIAL MODERATE TURB AND TO BE SEATED. APPROX 2/3 THROUGH THE BREAK WE ENCOUNTERED APPROX 10 SECONDS OF SEVERE TURB WITH A R 30-40 DEG DSNDING ROLL (1000-1500 FPM). DURING THIS TIME THE AUTOPLT REVERTED TO CTL WHEEL STEERING AND THE FO MANUALLY RESUMED CTL WHILE I REQUESTED AND RECEIVED CLRNC TO FL320. A FEW SECONDS LATER WE WERE CLR OF CLOUDS IN SMOOTH AIR. FOLLOWING THE EVENT; I COMMUNICATED WITH ATC; FLT ATTENDANTS AND DISPATCH. FLT ATTENDANTS ADVISED THAT 1 PAX; NOT WEARING SEATBELT; WAS INJURED WITH BRUISED HEAD AND NECK AREA. INJURED PAX ATTENDED BY PAX RN AND EMT.
Data retrieved from NASA's ASRS site as of January 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.