As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THE NR 2 ENGINE OIL PRESSURE IN AMBER AND INTERMITTENT RED IN FLIGHT. THE AIRCRAFT RETURNED TO DEPARTURE AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AND REPLACED THE NR 2 ENGINE OIL TANK PRESSURE VALVE. OPERATIONAL CHECKS WERE GOOD.