For aircraft maintenance courses including the EASA Part-66 syllabus and BTEC National awards in aerospace engineering. This book provides an introduction to the principles of aircraft digital and electronic systems. It’s written for anyone pursuing a career in aircraft maintenance engineering or a related aerospace engineering discipline, and is particularly suitable for those studying for licensed aircraft maintenance engineer status as part of an EASA or FAA FAR -147 approved course at college or sponsored by the major airlines.