As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT FROM SGF. THE LEFT OIL PRESSURE GAUGE DROPPED TO ZERO THEN FLUCTUATED BETWEEN ZERO AND FIVE PSI. THE CREW PERFORMED THE EMERGENCY SHUT DOWN CHECK LIST. AFTER DECLARING AN EMERGENCY THEY RETURNED TO SGF AND LANDED WITHOUT INCIDENT.