Originally Posted by
Alan Shore
A PB day is an X-day, albeit one that likely does not begin and end at midnight. It is therefore a non-fly day, and all the same rules apply. You just need to know when the X-day does end, and know that you cannot be assigned flying or short call earlier than 10 hours after that point.
AFAK a PB day on your schedule is always midnight to midnight. Any spill over will be part of a PR (I think) or "partial payback day". That is the one that doesn't end at midnight (or it wouldn't be a PR in the first place). So if a PR ends at say, 3:42AM, that becomes your "artificial midnight" and your first day assignment in that case would start at 13:42 or 15:42, depending on when you were notified. I think.