As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INITIAL CLIMBOUT THE OIL PRESSURE DROPPED TO ZERO, ALL OTHER INDICATIONS WERE GOOD. THE CREW INFORMED TOWER OF THIS AND REQUESTED A RETURN TO FIELD AT WHICH TIME THE TOWER DECLARED AN EMERGENCY FOR THE FLIGHT. ACFT CAME BACK AROUND TO 8L AND LANDED WITHOUT INCIDENT. REPLACED NR 2 OIL PRESSURE TRANSMITTER.