Join Date: Jan 2005
Location: New York, NY
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Posts: 9,424
Did some quick research... can't find any documentation to support the notion that Terminal A is on any sort of historical register. The old PA Administration Building, Marine Air Terminal and TWA Flight Center are the only terminal buildings at the PANYNJ airports designated as such.
There's really no unusual architectural or historical signifance of the Terminal A headhouse that would make it worthy of preservation. Too big, too expensive and not important enough to do so, IMO.