DI Precession
Hey guys/gals the rate of precession of a DI is adjustable by an instrument mech. There should be a limit applied of so many degrees per hour. If the instrument is outside limits then the gyro bearings might be on the way out or some such problem leading to complete failure.
Ask your instructors about the limits, store the answer/s in your memory data base and refresh mine.
It's this sort of thing that makes flying so fascinating and you NEVER stop wanting to learn more.