Pilots on Regional Passenger Jet say a 3rd Pilot in Cockpit Tried to Shut Down Engines

Pilots on Regional Passenger Jet say a 3rd Pilot in Cockpit Tried to Shut Down Engines https://ift.tt/J49SPy0 A pilot riding in the extra seat in the cockpit of a Horizon Air passenger jet tried to shut down the engines in midflight and had to be subdued by the two pilots.