Originally Posted by
goodo
Attempt #1: Can't make such a change without cancelling and starting afresh. Time for HUACA, fingers crossed!
Attempt #2: Couldn't do it without cancelling
Attempt #3: Could do it, but TXL isn't a *A hub

Just keep HUACA. I've done routing changes on schedule changes on two US award tickets, in one case going from FRA-YYZ(AC)-ORD-SEA(UA) to FRA-SEA(LH).