A cat escaped from its carrier before an Air Canada flight took off from Halifax Nova Scotia bound for Toronto. The flight was scheduled to leave at 5:30 AM but it was not to be.
As soon as the cat escaped it ran into the cockpit. Then the real trouble started. The terrified cat managed to get into an area where there were wires. To get at the terrified cat part of the cockpit actually had to be disassembled.
The plane ended up being grounded for several hours even after the cat Ripples was returned to its carrier. The wires within which the cat found refuge had to be inspected for damage. This is the first time Air Canada personnel can remember a cat getting into the cockpit of a plane. For more see this article. There is a poll about policy re pets at the bottom of the article. Those in favor of allowing pets were more than those opposed. Of those opposed most supported guide dogs as an exception. You still have time to vote.