“In the appellant’s view, on the plain and ordinary meaning of the definition of ‘required for safety purposes,’ the cause of the situation that leads to a safety issue, including whether it is due to the actions or inactions of a carrier, does not matter, except with respect to the carve-out for disruptions resulting from issues identified on scheduled maintenance. The only question is whether, in the circumstances that presented, whatever the cause, delaying or cancelling the flight was required by law in order to reduce risk to passenger safety.”
