Originally Posted by
visitor
I would guess that the floor panel failing is not a flight critical issue, but kudos to AC for taking the plane out of service when discovered on the ground.
As I recall, in the case of Turkish DC-10 that crashed in France, because of cargo doors not properly locked even though the unlocked doors indicators in the cockpit showed them locked, floor did play a role.
When the cargo door fell off, the cargo compartment lost pressurization and the pressure ended up applied on the floor, because venting was not sufficient, and the floor collapsed.
(On second thought not sure if that happened in the Turkish case, or in another DC-10 cargo door incident, a US-registered plane, over Canada -possibly Windsor. Which however survived and landed somewhere.)