They could have called it a stage or a studio, but the term they prefer is “the hangar.” Why not? Handily adjacent to Brooklyn’s Steiner Studios lot is a cavernous storage shed now used for housing a key component of ABC’s new series, “Pan Am”: the jet plane.

That is, the life-size mock-up of a jet plane’s passenger compartment. Mounted on a platform 5 feet off the concrete floor is the “fuselage” (no wings or tail) of the show’s proud Boeing 707 whose interior, in contrast to the raw shell of this plane-length tube, is designed in period-perfect detail that harkens back to the early 1960s — the dawning era of commercial jet flight when the luxury airline Pan American World Airways flourished and when “Pan Am” takes place.