Understanding how avionics systems work and what to do if a system fails inflight is essential for all pilots. For aircraft owners, this knowledge can translate into hundreds of dollars in savings on repair bills. Here, Edward Maher provides helpful details on every major avionics system, explaining how to troubleshoot: Radios; Intercoms, speakers, microphones, and headsets; Antennas; Transmitters and receivers; Navigation systems: Loran, ADF, and...