Meggitt Control Systems announced plans to use a software development package from Green Hills Software, of Santa Barbara, Calif., to build a cabin air temperature control system for private cabin-class jets. The Meggitt Control Systems’ bleed air system will be used on the Embraer Legacy 500 midsize and 450 midlight business jets, the company said. Meggitt Control Systems said the air temperature control system will control a series of smart and shut-off valves to supply air from the aircraft jet engines to several systems aboard the aircraft, including cockpit, cargo and cabin environmental and pressurization systems. Meggitt’s Control System will be certified to DO-178B Level A standards.