In a previous article, Roy Smith said:
(Paul Tomblin) wrote:
just sticking on a digital timer. I thought that was because of 91.205,
but on second thought it might just be because the analog clock is listed
in the POH as equipment it was certificated with.

Part of the issue is that your Westbend/RadioShack/etc timer isn't
installed in the airplane, so it doesn't count. What made the clock in the
panel magic was not that it had a second hand, but that it was mounted in
the panel.

Hmmm. Does anybody make a digital clock that's TSO'ed to replace a Piper
analog clock?

--
Paul Tomblin http://xcski.com/blogs/pt/
The Write Many, Read Never drive. For those people that don't know
their system has a /dev/null already.
-- Rik Steenwinkel, singing the praises of 8mm Exabytes