Quote:
If I taxi out to the run-up area and do run-up checks, then taxi to the holding point for the active runway but find something wrong with aircraft during pre-take off checks, so taxi back, does that count as flight time?
No.
Actually you can log this and I have done in the past as it is for the purpose of flight.
Quite often a wx radar tests serviceable in the preflight and then when it is activated on the runway prior to takeoff in the wet season it is found to be U/S. It's a no go item and the taxi time can still be logged.