What was found
(CAN) DURING CRUISE THE NR 4 ENGINE STARTED TO BACKFIRE AND SHAKE. THE ENGINE WAS SHUTDOWN AND THE PROPELLER FEATHERED. THE FLIGHT RESUMED WITHOUT INCIDENT.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) DURING CRUISE THE NR 4 ENGINE STARTED TO BACKFIRE AND SHAKE. THE ENGINE WAS SHUTDOWN AND THE PROPELLER FEATHERED. THE FLIGHT RESUMED WITHOUT INCIDENT.