Bryan Wood
Well Known Member
A friend with a 1978 172 has had 2 alternators fail. He has had the plane about 2 years and it has happened again. While talking about it he mentioned that part of his checklist during run up is to turn off the alt switch to see if the annunciator lights on the panel. Then switching it on the light goes off. Something about this seems like it would blow the diodes in the alternator by always bringing it back on line with the panel all lit up and everything running. What are you thoughts? He says that the POH has this in the checklist. It's been so long since I've flown a spam can I can't remember for sure but don't remember doing anything like this on my Cherokee. Anyway, I told him that I'd ask this here on the RV group since there is such a broad knowledge base to tap into.
Thanks,
Thanks,