If an error was intentional, the FAA can take action, officials said.

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That dean was not identified, and the school said it determined the leak was "an inadvertent error and not an intentional breach", with no further action taken.

BBC: Harvard University file picture

However, after review, school officials determined the dean in question had committed "an inadvertent error and not an intentional breach" by sending the message to two students.

CNN: Harvard apologizes after secret e-mail search