As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE CLIMBING THROUGH 16,000 FEET NR 1 ENGINE FAILED WITH A LOSS OF OIL PRESSURE INDICATED ON THE INDICATOR AND LOW OIL PRESSURE WARNING AND UNABLE TO FEATHER ENGINE. THE ENGINE WAS MANUALLY SHUT DOWN AND AN EMERGENCY WAS DECLARED. THE AIRCRAFT RETURNED TO DEPARTURE AIRPORT AND LANDED WITHOUT FURTHER INCIDENT. REPLACED NR 1 ENGINE TURBO MACHINERY AND REDUCTION GEAR BOX. TEARDOWN CONDITION REPORT ON REMOVED ENGINE PENDING.