For many years, tucked away in an MIT Lincoln Laboratory-operated hangar located at Hanscom Air Force Base near Boston, was the venerable Boeing 707-321B - N404PA - Pan Am 707 Clipper Seven Seas:
She was built in early 1965, and came into Pan Am’s fleet in March of that year, christened Clipper Seven Seas. One of the first B-707’s outfitted with new Pratt and Whitney JT-3D Turbofan engines, Clipper Seven Seas could operate with a marked improvement in range and profitability over earlier B-707 models.
For fourteen years she flew in PA livery, carrying thousands of passengers across millions of miles.
Following her Pan Am days, she had a short career on lease to several non-scheduled operators before landing in storage for most of the 1980’s. But unlike many of her contemporaries, she was destined for something more exciting than a future of slow dissolution in a desert “bone yard.” In 1989, N404PA, a quarter-century old but still ready for more flight time, Clipper Seven Seas was chosen to become a vehicle for research and development of advanced electronic systems. She’s been evolving in that role ever since, with appropriate modifications to accommodate new on-board equipment.
At her half-century mark, still looking great, she got lots of TLC from her owners – N404PA was serving her country as a flying electronics lab. Owned and operated by the Massachusetts Institute of Technology’s Lincoln Laboratory, which carries out research and development of advanced electronic systems under government contracts, Clipper Seven Seas was in the air for perhaps 100 hours each year, making local flights and occasional trips out to the western U.S. on longer missions.
Aircraft engineer Rick Coveno, subcontractor to MIT/LL provided the information on the history of N404PA.
https://www.ll.mit.edu/news/lincoln-laboratory-says-good-bye-its-airborne-test-bed
