This story recounts a pretty unpleasant ride for passengers on an A320 departing Las Vegas:
The plane took off and apparently lost hydraulics right away. Then it circled Las Vegas for five hours – lurching violently enough that people were vomiting – because it couldn’t dump fuel before an emergency landing and had to burn it off. The story says the A320 can’t dump fuel.
I thought dumping fuel was a typical feature on a passenger airliner, for exactly this reason. This turned out with just some nauseated passengers and a vomit-filled plane, but in that five hours the pilots might have lost control and crashed.