As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE ENG 1 FAIL & STRONG VIBRATION WAS FELT. IAW PRELIMINARY INVESTIGATION, PROBABLE CAUSE OF INCIDENT WAS A FLAW OF OIL SYS. IN PROCESS TO REMOVE & INTALL NEW ENG. REMOVED ENG WILL BE SENT IN ORDER TO ACCOMPLISH AN INVESTIGATION.