Air Canada crash landing in Edmonton was more serious than first reported - The Globe and Mail
When the right landing gear deployed, Ms. Kurylo saw that the tire was “shredded and flapping.”
Ms. Menard said the landing initially seemed normal and passengers hadn’t been told to brace into a crash position.
Then the plane suddenly started rattling as they went down the runway. The right landing gear collapsed and the plane started tilting to the right. Ms. Menard felt as if she was in a car about to roll over
This quote seems to point to a possible bad wheel shimmy die to the blown tire. Bad enough to cause the gear to unlock maybe?
The Dash 8 is known for landing gear shimmy. We used to call it the "Shopping Cart Shimmy".