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I have an examination tomorrow about advanced avionics systems (EASA module 13) and we are required to troubleshoot a fault with the compass system. What is the most commonly occurring fault with a gyro compass system and how is it detected or identified?

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  • $\begingroup$ It would help if you stated the fault. In my military a/c maintenance gyros failed for mechanical (things like gyro bearing failures) and electrical reasons (chafed wire, etc.). $\endgroup$ – Juan Jimenez Jan 28 '17 at 22:39
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Some idiot using magnetized a read by flux valve. Gears slipping. Sync knob sticking in. Leaving it in DG mode.so it drifts

Not correcting for Magnetic Variation changes unless you fly along an isogonal

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