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Transient alternator problem
Was flying IFR in the clear on top of an overcast layer today. I noticed at
some point that the ammeter was indicating zero, and not moving. The Alt warning light was not illuminated, except when I pressed the test button. I started to shut down non-essential electriconics in case this was for real. After a minute or two, the ammeter needle resumed normal indications, and stayed that way for the rest of the flight. The Alt warning light was properly illumated during low-RPM operations on the ground, as well as during the engine runup split switch check. The warning light/ammeter needle discrepancy suggests to me that problem was in the ammeter, and that the alternator was functioning normally the whole time. Anyone have any theories as to what would cause indications like this? Is external RF interference possible? Thanks, Jeremy |
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