A specialized book covering the fundamental techniques and regulations related to aircraft maintenance. - 11 volumes of Aviation Engineering Course (with scribbles and notes) For those who don't mind the writing, I'm offering these. Thank you very much. Aviation Engineering Course 1 Aerodynamics Price: 3080 yen Aviation Engineering Course 2 Aircraft Structure Price: 2530 yen Aviation Engineering Course 3 Aircraft Systems Price: 3410 yen Aviation Engineering Course 4 Aircraft Materials Price: 2860 yen Aviation Engineering Course 5 Piston Engines Price: 3080 yen Aviation Engineering Course 6 Propellers Price: 1870 yen Aviation Engineering Course 7 Turbine Engines Price: 3190 yen Aviation Engineering Course 8 Aircraft Instruments Price: 2750 yen Aviation Engineering Course 9 Fundamentals of Avionics and Electricity Price: 3740 yen Aviation Engineering Course 10 Avionics and Electrical Equipment Price: 3300 yen Aviation Engineering Course 11 Helicopters Price: 3080 yen Total: 32890 yen -> 16445 yen Thank you very much.