 The 12 psi cabin results in a sea level cabin through 41,000 ft and less than a 1,800 ft cabin at its ceiling of 49,000 ft.The 12 psi cabin was first demonstrated in flight by company pilots on August 23, 2004.The original SJ30-1 prototype was on display at the Lone Star Flight Museum in Galveston, Texas when it was flooded by Hurricane Ike.