Correct. We’re saying the same thing in different words. But the time determined from table b + 4 hours is then from the start of the RAP period.

So if you start a 2am RAP and you get a call for a 4:30am show. Determine the legal FDP for a 4:30am start time. Table b says 10 hours. So 10+4 = 14. Since that is less than 16 hours, 14 hours is the controlling legal FDP. While the start of the FDP was used to determined legal duty period length of 14 hours, that 14 hour clock starts at the beginning of the RAP period. Not from the 4:30am show.

So a 0200 short call with a 0430 show must duty off no later than 1600 (not including the possibility of a backend deadhead).

I will admit though that I did just learn after all these years that the calculated FDP is from the show time, not the beginning of the RAP period. I just consider myself lucky that I haven’t had a reserve assignment bad enough (or a rap period early enough) to have it even become a question.

Like I said, pre 117 life was far more fatiguing, but far less complicated. Oh, simpler times :-)

the way I was taught is Table B after report but never greater than RAP + 4. So just calculate rap + 4 (16 hrs) as in most instances that will be controlling unless they happen to call you right at the beginning of a RAP and it’s a busy day in which case FDP might be more restrictive.

if RAP begins at 0200, you have to duty off by 1600 (unless on a deadhead). If you get called right at 0200 and it’s 3 legs you would calculate from table B how long your FDP can be and add that to report time (0430). Whatever is more restrictive (1600 (RAP + 4) or the Report time plus table b FDP, is the mandatory duty off time