The Piper Seneca is an American dual-engine aircraft which has been in production since 1971 with little to no changes to the original design. As of today over 5000 of these were manufactured and there is demand for more. The cabin is not pressurized, buit in case of need, oxygen masks can be used, because the airplane is equipped with with compressed air connectors and is able to climb to 25000 ft above sea level. The maximum speed is 225 mph.