For the helicopter specialist, this EASA module 12 compliant textbook covers all factors of helicopter maintenance from aerodynamics, to vibration monitoring, to a detailed understanding of rotor and transmission components, and including all relevant ATA systems such as electrical, hydraulic, fuel, fire, ice and rain, onboard maintenance systems, and much more.  Available as a paper book, ebook, and online. For more information see www.actechbooks.com/0129-EASA-B.html