I remember an incident from the Cmk1 conversion which involved the stick shaker going off when coming into land after the first aircraft’s test flight. Although everything was checked out okay, it still happened on the next flight and obviously the crew were not too happy.
The cause was traced to corrosion on relay contacts within the flap drum switch, which upset the values when the AOA was set up. The corrosion occurred during the 18 months it was sat on the ground being converted.
You can prepare an aircraft for flight iaw the manuals, but things can still catch you out because the manuals assume regular operation. A short hop within the UK will be hard enough. I’m not sure I would like to be on board during a trip across the pond.