recapen(at)earthlink.net
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 Posted: Thu Aug 16, 2012 5:28 am Post subject: Mooney Alternator woes |
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My hangar neighbor is trying to figure out why his alternator occasionally drops off line - requiring a weird reset sequence. He has to shut off the battery and field, then go to a low power setting and bring it back up again. Something about resetting an overvoltage protection device.
It is an M20S with Cont 550 and gear driven alternator. The first regulator lasted only a couple of years before giving up the ghost and the replacement was a special from Mooney.
My first line of thinking is to locate the regulator and test it. Nobody knows where it is hiding.
(I'm in DC - the plane is in DE...I'll be home next weekend to help more.)
Meanwhile, does anyone have an electronic copy of the Light Plane Maintenance article on troubleshooting alternators...and the Mooney M20S maintenance manual?
If we can find it, I'm hoping that we can determine if the regulator is the culprit.
Thanks in advance,
Ralph
RV6A N822AR in N06 - waiting for my engine/prop to come back from overhaul after being hit by a flying hangar door!
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