As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ANC - FLT 3423 - AIR TURN DUE TO THE NR 2 ENGINE OIL PRESSURE BEGAN FLUCTUATING BETWEEN 20 AND 120 PSI. THE ACFT LANDED ANC WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE NR 2 OIL PRESSURE TRANSMITTER AND RETURNED THE ACFT TO SERVICE. (Z)