As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BUF - FLT 3000 - CREW REPORTED THAT DURING CRUISE, THE RIGHT HAND ENGINE LOST OIL PRESSURE, AIRCRAFT DIVERTED TO BUF. MAINTENANCE INSPECTED O-RINGS IAW EMB-120 MM 73-12-00. OPERATIONAL AND LEAK CHECKS WERE GOOD IAW EMB-120 MM 71-00-00. AIRCRAFT RETURNED TO SERVICE. (X)