"Viperdoc" wrote in message ...
My 1980 B-55 has uneven load distribution on the two alternators, with the
right side consistently reading around 15% lower than the left.

Is this an indication of a problem with the alternator like a bad diode, or
is this normal operating behavior?

They match within 15%? That's great. Even tho the POH suggests better.

You should check to verify that each can handle the load by itself, even at
fairly low RPM like 1500. That will eliminate the possibility of
failed diodes.

You do switch between regulators on each trip, don't you? That
way you know both regulators work. T'aint redundant otherwise.

Bill Hale, BPPP instructor