7/8 UA836 PVG-ORD delayed due to mechanical problem and crew is timing out so when we finally take off (they have to take off in 20 mins from now otherwise we will be cancelled) we will fly to SFO instead.

I'm on the flight... original ETD 1500, now it's 1840. Scheduled to land at SFO at 1735. We still don't know if we will connect to different flights (to everyone's final destinations) at SFO, or we will all stay on the plane (and they swap in a new crew) and we continue flying to ORD.