This book was written to aid in familiarization of large transport category aircraft and their onboard systems. The text is designed for the pilot or engineer who has some basic knowledge of transport aircraft terminology and systems. The emphasis is on introducing the reader to systems through the use of sample aircraft such as the Boeing 727,737,747,757,767,777, the Airbus A320 aircraft, the Douglas DC-10, and the Lockheed L-1011. The components of all major systems are illustrated and described in detail. This book is suitable for advanced pilots, engineers, and instructors.