Cabin noise varies by aircraft type, and newer widebody aircraft are often much quieter than older models, such as the Boeing ...

PCA (Preconditioned Air) systems are used to introduce fresh conditioned air into an aircraft cabin while the aircraft is parked at a gate or maintenance site. Air is filtered, heated, or cooled, and ...

Credit: Lufthansa Technik Encased in the tail cone of commercial, business, and military aircraft, auxiliary power units enable cabin environmental control system operation without relying on ground ...