As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATB JNU FLIGHT 8216: SHORTLY AFTER ROTATION THE NR 2 ENGINE OIL PRESSURE GAUGE ILLUMINATED FALLING OIL PRESSURE, CRC ACTIVATED FOR 5 SECONDS THEN RETURNED TO NORMAL. CREW ELECTED TO RETURN TO JNU. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED OIL PRESSURE REGUATOR INTERNALS AND REMOVED AND REPLACED OIL PRESSURE TRANSMITTER AND LOW OIL PRESSURE SWITCH. AIRCRAFT RETURNED TO SERVICE.