“Air Force One Down” (** out of four) was a mundane action melodrama about a determined rookie Secret Service agent (Katherine McNamara) who boards the title plane while protecting the President (Ian Bohen doing his best impersonation of Gavin Newsom) but has to battle treachery when turncoat agents and terrorists seize control of the plane. Initially appears to be a remake of “Air Force One” but the plane gets grounded pretty quickly and so does film in routine action stylistics. Still overall watchable, though, and has a proficient amount of hand-to-hand combat and gunplay.