All Nippon Airways flight NH-823 made an emergency landing in Okinawa, Japan, on December 18.
Authorities said the Boeing 767-300, en-route from Tokyo Narita Airport, Japan, to Taipei, Taiwan, was forced to divert after the crew reported haze in the cockpit.
The plane landed uneventfully. All 198 people on board remained safe.
The airline arranged a replacement plane for the passengers.
The incident is being investigated.