Incident
The flightcrew inadvertently flew into an area of clear air turbulence. The encounter occurred despite weather forecasts that indicated there would be no turbulence in that area. The ability to forecast clear air turbulence over the ocean is limited.
Communication and Announcements
Prior to the turbulence encounter, the captain instructed the flight attendant to make seat belt announcements. These announcements were made and translated into Japanese several times. However, during one instance, the Japanese-speaking flight attendant did not fully translate one of the captain's instructions to fasten seat belts into Japanese. Most of the passengers aboard spoke only Japanese.
Implications of Translation
The incomplete translation meant that some passengers may not have received the full instruction to fasten their seat belts. The source does not specify whether this contributed to any injuries or damage. The flightcrew's inadvertent entry into clear air turbulence, combined with the communication gap, highlights challenges in aviation safety regarding turbulence forecasting and multilingual crew-passenger interactions.