As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH INTO BOS CREW RECEIVED RT ENGINE AMBER OIL PRESSURE MESSAGE AND OIL PSI TURNED RED. CREW FOLLOWED QRH AND PERFORMED A PRECAUTIONARY ENGINE SHUT DOWN. AN EMERGENCY WAS DECLARED WITH ATC AND FLIGHT LANDED WITHOUT FURTHER INCIDENTS. MAINTENANCE PERSONNEL REMOVED AND REPLACED RT FUEL/OIL HEAT EXCHANGER IAW 79-20-02. NO OIL LEAKAGE FOUND AND OPERATIONAL CHECK WAS GOOD. AIRCRAFT WAS RELEASED FOR RETURN TO SERVICE.