"Stealth Pilot" wrote in message
...

had a tacho fault in a cessna once. would periodically read zero in
flight. on the next flight it would be ok. needless to say it would
always work perfectly when the maint guy disassembled it and looked it
over. then it would fail and read zero again.

I *hate* intermittent faults. The mechanic always looks at you like you're
nutso.

Rich S.