On Wed, 29 Dec 2004 00:44:55 GMT, Mitty wrote:

Hangar flying today, one high-time CFII, MEI, etc. expressed concern with
leaving the pitot heat on in warmer weather. Says he wants the heat in clouds
so the pitot doesn't fill up with mist/moisture/water but he turns it off in the
clear for fear of burning it out.

I've never heard or read about either of these issues before. Comments?

There should be no concern with burning it out when in flight, irrespective
of the ambient temperature. It should not be turned on on the ground for
longer than needed to check its operation, unless the temperature is near
freezing or below.