I think* I see the calculation on my schedule. The part I wasn’t understanding is that on my 2nd GS, the PR time isn’t based on midnight. It’s based on my “new x-day” time.
In other words, unless you have the rare 1500 release that keeps the +9 math at midnight, you will get a new x-day start/end time that is the PR on the first GS.
Example:
On the first GS, you get a partial payback day (PR) added to your schedule based on midnight. So if release plus 9 puts you at 0800...you get 8 hours of additional/partial (PR) time.
Now 0800 to 0759 is your new x-day.
Any trip time violates 0800 to 0759 = full PB.
Now if you fly a 2nd GS and the release+9 time is 0300...they owe you not a PR of 0300 like the mec scenarios might lead you to believe. They use the same logic as the first GS, only your x-day isn’t based on midnight it’s based on 0800. Your added PR time would be +19:00hrs. So for any
0800-0759 flying = full PB. Plus a 19:00 PR added to the mix.
To add another layer of confusion...this 2nd GS math moves the previous 1GS math in a straight manner....so expect a different PR time once the multiple GS are added.
*Again, this is for GSs on straight x-days...no on call reserve days or flying on PB days involved*
If I’m wrong...I apologize. If I get corrected I’ll repost. But this jives with my schedule and the rules laid out in the mec memo.