Especially in winter, the engine spends quite some time running the oil up to the recommended minimum of 50 deg C. I assume this running time should be taken into account for determining engine maintenance intervals.
I do not keep a separate engine running log, so I use the aircraft log for maintenance intervals, and that one mentions Hobbs time and my Hobbs timer is currently wired to run as long as the master keyswitch is "on". I plan to wire it through an oil pressure switch, though.
Or would the o/p really mean a separate "technical log" to keep track of the engine's running, separate from the aircraft's log?
So that my aircraft log does mention Hobbs time. And during my tuition, I was told that all logs (aircraft, pilot, airfield) must mention the same time for beginning and end of the flight. But that was outside CAA-land.
Last edited by Jan Olieslagers; 11th March 2012 at 20:11.