Originally Posted by
Himeno
If you booked for example BOS-SLC, and that route (where ever they happened to have the stopover point) was no longer operating, they would rebook you with a connection at one of AAs many hubs, so you might now have BOS-DFW-SLC. If the ticket was maxed out with the 16 segment e-ticket limit, they would tend to wait until the first few flights have been taken before making the changes, eg they'd wait until you have 12 flights left before changing it.
If that can't happen, such as the flight being first, they would get creative and find ways around the e-ticket limits.
I ticketed a DONE5 that starts in 2017 CPT-DOH-AKL-.... After ticketing, QR delayed the start of DOH-AKL, so I had to be rerouted DOH-SYD-AKL. Since I was maxed out at 16 segments, the AA RTW desk dropped a DFW-xxx-DFW pair of segments so they could add DOH-SYD-AKL. As soon as I fly the first two segments, I'll call and they'll add back the DFW-xxx-DFW.
Originally Posted by
JAXBA
BA (and presumably other airlines in Amadeus), are able to take one coupon, and invol reissue that coupon alone, so you would still have your original 16 coupon e-ticket, with one coupon invol exchanged to another ticket that may have another 1+ coupons on it (however many were needed to replace the affected single coupon flight).
I've had AA (who uses Sabre) and other airlines do this, but it's always been airport agents doing it during irregular operations (when flights are delayed or cancelled). I'm not aware of reservations people doing it.