Come on guys (and girls), we know that all FTL's can be somewhat confusing but, this is one of the more simple concepts!
There are two types of duty,
1. Flight duty period, that is any duty associated with a flight ( not dead heading) that starts 1 hour before ( yes we know that's not when we report, but sh*t happens!) and finishes when you set the parking brake, even if you position afterwards.
2. Duty period, that is any duty, (flight, sim, ground school, dead heading, office duty etc) that starts a certain time before the duty, 1hr b4 flight, (45mins b4 dead heading I think) and finishes 30 mins after the park brake or when you go on blocks when you are positioning .(some other exceptions) and this time is when your legal rest starts.
Simple as mud!
