I log tach/hobbs time. As far as I'm concerned, the minute the props are turning, it's loggable. Moving an aircraft around by its own power takes almost as much skill as flying it, albeit a different one. It's not like someone with no knowledge of flying/aircraft systems could get it started, so as soon as something demands special skills that you have been trained for, it's fair game.
The only time I wouldn't log it is if I start engines, but never move it.
Last edited by AdamFrisch; 29th Oct 2012 at 20:12.