SRH page 151 (pay examples start on page 154) to learn the ins/outs of RR pay

Rerouted+ app to actually do the math.

I thought that's what I said. Once the rotation is over, you find the first rerouted leg vs the original rotation and the first break in duty after that reroute. Everything after that break in duty pays 100% RRPY. It doesn't matter how many times or how frequently a new "reroute" came off the ACARS printer.

Fixed my post for clarity.

Let’s say you have a four leg day. You’re a reserve pilot so the first turn gets swapped out before you even operate anything. Those two legs will be paid at 50%. Then you fly a leg that is part of your original rotation. Instead of operating to base for that last leg you get rerouted to deadhead back. That fourth leg will pay 100% above because it is a subsequent reroute after you’ve returned to your rotation, even though it is before the break in duty.

Has anyone ever had a reroute on a non-MAC charter rotation? Currently fighting a case. The SRH and the PWA state that you cannot change the origin or destination. you remove the pilot and rebuild the rotation. It’s an illegal assignment, but we flew it anyway and grieved later. So far, they disagree.

I don't believe this is true, but am happy to be corrected.

The SRH has this paragraph:

"If you are rerouted then subsequently returned to your original rotation, and then rerouted an additional time, the pay treatment continues to be single pay, no credit for any flight segments added to your original rotation, whether deadheading or operating. There is no initial one-half pay step in this instance, and any subsequent reroute will always pay single pay, no credit."

But that paragraph is sandwiched between 2 other paragraphs regarding break-in-duty. And the "continues to be single pay" portion seems to also reflect this break in duty. I don't see any PWA reference to support what you stated either.

Again, I'm happy to be corrected on this.