As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE - FLT 3237 - CREW REPORTED DURING CRUISE FLIGHT, THE LEFT HAND ENGINE OIL PRESSURE ROSE TO 140 PSI. AIRCRAFT RETURNED TO FIELD WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT THEN REMOVED AND REPLACED THE OIL PRESSURE TRANSMITTER IAW B1900 MM 79-30-00. OPERATIONAL CHECKS SATISFACTORY. AIRCRAFT RELEASED FOR SERVICE. ACFT TT 3,234.5 HOURS. ACFT TC 4,053. (X)