Pilots on a regional passenger jet say a 3rd person in the cockpit tried to shut down the engines

Associated Press

A person riding in the cockpit of a Horizon Air passenger jet tried to shut down the engines in midflight. The incident happened Sunday on a flight from Everett, Washington, to San Francisco. The plane diverted to Portland, Oregon, where it was met by law enforcement officers. Alaska Airlines, which owns Horizon, said Monday that the crew reported “a credible security threat related to an authorized occupant in the flight deck jump seat.” When the jump seat, a third seat in the cockpit, is occupied it’s often by an off-duty pilot but can be other airline employees or federal safety inspectors.