Originally Posted by
AtlCSIP
It is probably due to the potential for a 117 violation for flight or duty time limits. Even if the trip is on the same days, a change in flight time or duty time, or even duty completion time, can have an effect on which pairings can be awarded in the next month. Just a guess.
Correct. It used to be that you could not WS either. Now you can due to a side letter a few years ago (that is now part of the contract). Perhaps some inputs to your reps might make the ability to conduct a swap during this period a contractual priority?