As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF, THE CREW REPORTED THE OIL PRESSURE DROPPED TO ABOUT 40 PSI ACCOMPANIED BY A TEMPERATURE INCREASE TO 800 DEGREES AND TORQUE FLUCTUATIONS. THE CREW PERFORMED AN AIR-TURN-BACK. MAINTENANCE INSPECTED THE AC AND REPLACED THE RT ENGINE. WITH ALL OPS CHECKS GOOD, THE AC WAS RETURNED TO SERVICE. (K)