What: Air Canada Boeing 777 en route from Vancouver to Toronto
Where: Vancouver International Airport
When: Dec 16, 2010
Who: 224 passengers
Why: While en route, the Boeing developed an oil pressure problem (indicator) in one of the engines. No smoke was reported.
The pilots returned to Vancouver and made a safe landing. No injuries were reported. Passengers disembarked and boarded another plane which left for Toronto around noon.
Qatar Airways flight QR-24 had to divert and make an emergency landing in Vienna, Austria, on November 26th.

