Module 13 is the core curricula for EASA B2 and any other high quality avionics program. This book is completely aligned to EASA Part 66 Appendix A and written to the extent typically taught during a 2400 hour program at an approved EASA Part 147 school. It covers the operation and maintenance requirements of the actual components and systems discussed here, including hydraulic actuators and landing gear construction, which are connected to every other system and have some sort of electronic interface. The knowledge gained from this module is then expanded by maintenance data provided by the aeroplane manufacturer and the approvals of the various civil aviation competent authorities.