On bonanzas fitted with the IO520B engine, the alternator is gear driven.
I seem to recall a Beech bloke at a safety seminar warning against EVER (emergency excepted) turning off the alternator at start, and then on with the engine running.
His rationale was that the shock load on the alternator drive when the alternator was suddenly turned on could possibly weaken and shear the undampened alternator drive. This could then cause metal ingress and the broken gear drive components possibly jamming and causing an engine failure.
Last edited by BEACH KING; 22nd June 2012 at 03:07.