On Nov 27, 10:17 pm, skym wrote:

The alternator on my 180hp Lycoming is putting out a whine in my
headset. My a/p recommends a replacement. It's 7 yrs (about 600 hrs)
old. Is this reasonable time frame for an alternator to last?

I hope you're not using the FBO on the field to make that determination.
Over here on the westend we have a great mechanic who just retired
from Corporate Air last December. He works out of his T Hangar on the
back side of mine, you left the note there last year.