A common guide to Joe Schafer's maintenance manual containing over 1,300 questions and answers to help students revise the subjects covered in "Helicopter Maintenance" with covers Helicopters in Use Today, Principles of Flight, Documentation, Publications and Historical Records, Helicopter Fundamentals, The Main Rotor System, Mast and Flight Controls, Main Rotor Transmissions, Powerplants, Tail Rotors, Airframes and Special Purpose Equipment. Written in concise, simple language and packed with photographs and illustrations.