As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT DEPARTED AND DURING CLIMBOUT, EXPERIENCED A FLUCTUATION IN ENGINE OIL PRESSURE ON THE NR 1 ENGINE. OIL PRESSURE DECREASED BELOW OPERATIONAL LIMITS AND WAS SHUTDOWN. AN EMERGENCY WAS DECLARED AND RETURNED TO DEPARTURE, LANDED WITHOUT INCIDENT. ENGINE R & R WITH NEW ENGINE IAW AMM 72-00-00-890-803.