What: Cathay Pacific Boeing 777-300ER en route from Hong Kong to Los Angeles
Where: Anchorage
When: Nov 22, 2012
Who: 288 passengers and 18 crew
Why: While en route, the Cathay Pacific developed a pressurization problem and had to make an emergency landing in Alaska. There were no injuries. When the pressurization problem developed, oxygen masks were deployed.
Cathay Pacific and the Civil Aviation Department will be investigating.
Passengers were provided hotel accommodations and an alternative flight.
The cause of the pressurization problem is speculated to be a malfunctioning valve in the air system