Incident Overview
Date: Wednesday 9 December 1987
Aircraft Type: McDonnell Douglas MD-81
Owner/operator: TOA Domestic
Registration Number: JA8468
Location: 30 nm west of Oshima –
ÿ Japan
Phase of Flight: En route
Casualties: Fatalities: 0 / Occupants: 104
Component Affected: Aircraft seatbelt system.Aircraft seatbelt system.
Investigating Agency: JTSBJTSB
Category: Accident
An aircraft experienced severe turbulence approximately 30 nautical miles west of Oshima VORTAC following the activation of the seatbelt sign. The turbulence exhibited a range of g-forces, fluctuating between -1.10 and +1.76, lasting approximately two seconds.An aircraft experienced severe turbulence approximately 30 nautical miles west of Oshima VORTAC following the activation of the seatbelt sign. The turbulence exhibited a range of g-forces, fluctuating between -1.10 and +1.76, lasting approximately two seconds.
Description
The aircraft encountered severe turbulence at FL290 about 30 nm west of Oshima VORTAC. Turbulence was encountered shortly after the seat-belt sign was turned on. FDR analysis revealed that the aircraft encountered turbulence varying from minus 1.10 to plus 1.76 g and lasted about two seconds.
Primary Cause
Seatbelt sign activation likely triggered the turbulence.Seatbelt sign activation likely triggered the turbulence.Share on:
