https://www.npr.org/2023/10/23/ [login to see] /off-duty-pilot-attempted-to-shut-off-the-engines-in-flight-alaska-airlines
An Alaska Airlines flight was forced to make an unexpected landing Sunday night after an off-duty pilot who was riding in the cockpit allegedly attempted to disable the aircraft's engines.
"I'll just give you a heads-up. We've got the guy that tried to shut the engines down out of the cockpit," one of the pilots said to air traffic controllers in audio posted by LiveATC.net. "It doesn't seem like he's causing any issue at the back. I think he's subdued."
The flight, which was operated by Horizon Airlines, took off from Everett, Wash. around 5 pm Sunday evening. The Embraer 175 jet had to be diverted from San Francisco to Portland, Ore. where it landed safely.