Thanks for your answers. Sorry I was in Brussels yesterday and couldn't check the forum.
Henry VIII, what is your airline? Oceancrosser, are you from Mongolian Airlines?
Indeed, interpretation of Subpart Q is ambiguous... It is said that FDP is any time spent IN THE AIRCRAFT as a member of its crew, but also that FDP begins when reporting for the flight... But practically, I think this last point is the one that should be retained ==> not legal to have a DP beginning before a FDP (except for duties totally not related to the flight)
Does anybody else could tell us how it is its airline?
Many thanks