From the CBC, correcting the aircraft type while getting the flight number wrong and maybe not counting the nosewheels.
Air Canada plane loses wheel en route from Montreal to London
Spokesperson said the missing wheel did not impact safe operation of flight
CBC News Posted: Apr 18, 2017 8:28 AM ET Last Updated: Apr 18, 2017 11:23 AM ET
Flight AC833, an Airbus A330, was carrying 294 passengers when it left Montreal with a wheel missing. It landed safely at London's Heathrow Airport. An Air Canada plane that lost a wheel before taking off from Montreal's Trudeau International Airport on Sunday evening ended up landing safely at its destination of London's Heathrow Airport.
Flight AC833, an Airbus A330 carrying 294 passengers, landed Monday morning, said Air Canada spokesperson Isabelle Arthur in an email.
She said preliminary information shows the wheel separated from the plane while it was taxiing down the runway. It was unclear whether the pilot had known about the missing wheel prior to takeoff.
Arthur said because the landing gear has eight wheels, a missing one didn't cause any issues.
The plane is being repaired, Arthur said.
In February, an Air Canada flight featuring the same kind of aircraft, an Airbus A330, was grounded while preparing to depart from Brussels airport due to damage to its wheels.
"We maintain our fleet to the highest standards and these two events are isolated," Arthur told CBC News in the email.
Air Canada plane loses wheel en route from Montreal to London - Montreal - CBC News
I'm not a journalist but it looks to me like the plane was probably C-GFUR, an A330-343.