What concerned me after watching the program last night was that you had an airline which had been flying a type (in large numbers - 36 in service) for 12-13 years, which didn't seem to know certain vital facts.
They would have faced bad weather and they would have practiced drills in simulators; aren't the simulators Level 5 and therefore fully representative of the aircraft? It just seems strange that after what must be a good few thousand hours they can come along say, "what, 1 and a half inches . . . we never knew that?"