I once flew to Havana via Cubana from Toronto and a guys seat fell into the aisle upon take off.
They just gave him another seat, strapped the loose seat down and went on our merry way.
Not sure of the plane model.
Air Canada had some Maintenance issues when fueling a 767 in North Ontario. It glided into Gimli at an abandoned air strip.
Another Airbus was on its way to Lisbon vis Azores and had to glide in from 35000 feet. All Man made issues!!!
I do not fly Air Canada.
The DC9 had tail cone issues upon landing. A friend of mine was passenger on a DC9 in Argentina back in late 80's it vaporized upon take off...Maintenance or lack there-of.
If you loose an engine on the smaller regional planes the second engine will take you to the scene of the accident.
Maintenance People Maintenance.... the rest is a turkey shoot. We do not have to fly PAWA ; if others do, that's their choice.
Light a candle for them.
Russell