John Schwaner, proprietor of Sacramento Sky Ranch, and creator of the Mechanic's Toolbox, authors one of the most definitive manuals on aircraft engine maintenance we’ve ever seen. His comprehensive book takes you from the fundamentals of how an aircraft engine works to the arcane art of engine diagnostics. In between, John takes the time to give the reader a detailed explanation of how each component of a modern aircraft engine affects performance. He covers factors such as lubrication and wear, electrical issues, mechanical alignment, heat related problems, vibration and balance, etc. The chapter on troubleshooting alone is worth it’s weight in gold. Highly recommended. 2 lbs (1Kg) shipping weight.