The aircraft time is recorded by the tachometer in most
cases and the Hobbs meter is used to record time for billing
users. But if the tach works for RPM, you should be able to
log the hours from the clock/wrist watch and note the inop
condition of the hourmeter. When the tach is replaced the
new total time will be entered in the logbook. See the
required equipment list in the POH to see what is required.

As long as the RPM is working, the hour/meter portion should
be placarded as "inop, record clock time in the logbook" to
meet the airworthiness requirements.


--
James H. Macklin
ATP,CFI,A&P

--
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But government sees it as an obstacle to be overcome.
some support
http://www.usdoj.gov/olc/secondamendment2.htm
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"Mitty" wrote in message
...
| Anybody know whether this is an airworthiness issue? I
was flying CAP cadets
| today and discovered the problem. We have a kid taking a
private ride on Monday
| and would not like to switch airplanes on him.
|
| Obviously it's not on the required VFR equipment list, but
since without it you
| no longer know the airframe or engine hours for ADs,
inspections, etc. it seems
| to me that there is likely to be a requirement for it
buried somewhere.
|
| TIA