Air carrier widebody transport encountered turbulence in area of thunderstorm activity. Altitude deviation excursion from clearance altitude and passenger and cabin attendant injury.

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Attributes
ACN	150685
Time
Date	199007
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : bda
State Reference	FO
Altitude	msl bound lower : 35000 msl bound upper : 35000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : txkf
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute : atlantic enroute : other oceanic enroute airway : g432 enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 160 flight time total : 14000 flight time type : 1700
ASRS Report	150685
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 200 flight time total : 7800
ASRS Report	151157
Events
Anomaly	altitude deviation : excursion from assigned altitude inflight encounter : weather
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Primary Problem	Weather
Air Traffic Incident	other

Narrative:

We had been deviating around thunderstorms and were returning to course when we suddenly encountered severe turbulence for 10-15 second, losing 500 ft of altitude. One radar was on 30 mi the other 60 mi range and maximum gain with only scattered light green return until the last sweep prior to the encounter, when we both observed a faint red return directly on our nose. The seat belt sign was on. The F/as were securing in coach and they and their equipment were tossed around violently. One passenger and one F/a were injured by serving equipment. We were fortunate that none of the serving carts did more damage.

Original NASA ASRS Text

Title: ACR WDB ENCOUNTERED TURB IN AREA OF TSTM ACTIVITY. ALT DEVIATION EXCURSION FROM CLRNC ALT AND PASSENGER AND CABIN ATTENDANT INJURY.

Narrative: WE HAD BEEN DEVIATING AROUND TSTMS AND WERE RETURNING TO COURSE WHEN WE SUDDENLY ENCOUNTERED SEVERE TURB FOR 10-15 SEC, LOSING 500 FT OF ALT. ONE RADAR WAS ON 30 MI THE OTHER 60 MI RANGE AND MAX GAIN WITH ONLY SCATTERED LIGHT GREEN RETURN UNTIL THE LAST SWEEP PRIOR TO THE ENCOUNTER, WHEN WE BOTH OBSERVED A FAINT RED RETURN DIRECTLY ON OUR NOSE. THE SEAT BELT SIGN WAS ON. THE F/AS WERE SECURING IN COACH AND THEY AND THEIR EQUIP WERE TOSSED AROUND VIOLENTLY. ONE PAX AND ONE F/A WERE INJURED BY SERVING EQUIP. WE WERE FORTUNATE THAT NONE OF THE SERVING CARTS DID MORE DAMAGE.

Data retrieved from NASA's ASRS site as of July 2007 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.