Written to meet the needs of aircraft maintenance certifying staff, this book covers the basic knowledge requirements of ECAR 66 (previously JAR-66) for all aircraft engineers within Europe. ECAR 66 regulations are being continuously harmonised with Federal Aviation Administration (FAA) requirements in the USA, making this book ideal for all aerospace students. ECAR 66 modules 1, 2, 3, 4, and 8 are covered in full and to a depth appropriate for Aircraft Maintenance Engineers (AME). This book will also serve as a valuable reference for those taking programs in ECAR 147 and FAR 147 establishments. In addition, the necessary mathematics, aerodynamics and electrical principles have been included to meet the requirements of introductory aerospace engineering courses. To aid learning and to prepare readers for examinations, numerous written and multiple-choice questions are provided with a large number of revision questions at the end of each chapter.