I've never seen our ammeter reading zero before. Doesn't any load on the
battery mean constant discharge and therefore constant charge for the
alternator? Normally, the needle is so sensitive that you can see it
jumping in sync with the anti-collision strobe.

"Martin Kosina" wrote in message
om...
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.

Hmmm - I thought the ammeter *should* indicate zero when the battery
is fully charged and the electrical load is not changing ? What is the
"normal" indication you are refering to ?