See: Palmdale Regional Airport for the civilian joint-use airportUnited States Air Force Plant 42 (Plant 42) (IATA: PMD ICAO: KPMD FAA LID: PMD) is a United States Government aircraft manufacturing plant used by the United States Air Force. It is also used by the National Aeronautics and Space Administration (NASA).Plant 42 and Palmdale Regional Airport (PMD) are separate facilities that share a common runway at the site.