Incident Overview

Date: Wednesday 27 April 2011
Aircraft Type: Boeing 767-381
Owner/operator: All Nippon Airways – ANA
Registration Number: JA8569
Location: 27 nm ESE of Kushimoto – ÿ Japan
Phase of Flight: En route
Casualties: Fatalities: 0 / Occupants: 119
Component Affected: The left aft lavatory of the Boeing 767-381 aircraft.The left aft lavatory of the Boeing 767-381 aircraft.
Investigating Agency: JTSBJTSB
Category: Accident
On All Nippon Airways flight 610, a Boeing 767-381, turbulence occurred approximately 27 nautical miles east-southeast of Kushimoto. One cabin attendant sustained serious injuries in front of the left aft lavatory. Four other passengers and cabin attendants experienced minor injuries. The incident was likely caused by sudden atmospheric disturbance, potentially triggered by a wind shear within a jet stream zone.On All Nippon Airways flight 610, a Boeing 767-381, turbulence occurred approximately 27 nautical miles east-southeast of Kushimoto. One cabin attendant sustained serious injuries in front of the left aft lavatory. Four other passengers and cabin attendants experienced minor injuries. The incident was likely caused by sudden atmospheric disturbance, potentially triggered by a wind shear within a jet stream zone.

Description

All Nippon Airways flight 610, a Boeing 767-381, was flying at 25,000 ft, 27 nm east-southeast of Kushimoto when the aircraft encountered turbulence and one cabin attendant was seriously injured in front of the left aft lavatory. Four other people consisting of passengers and cabin attendants were slightly injured. Probable Causes It is highly probable that the accident occurred as follows: The aircraft encountered atmospheric disturbance all of a sudden during flight, and was shaken so severely that one of the cabin attendants in the aft section of the aircraft was seriously injured after she was thrown up in the air and fell on the floor. It is possible that the atmospheric disturbance the aircraft encountered were CAT which was created locally and temporarily by a wind shear in the vicinity of frontal zone beneath a jet stream.

Primary Cause

Sudden atmospheric disturbance, possibly originating from a wind shear within a jet stream zone, caused by the aircraft’s motion.Sudden atmospheric disturbance, possibly originating from a wind shear within a jet stream zone, caused by the aircraft’s motion.

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