As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE OIL PRESSURE DROPPED TO 30 PSI. SHUT DOWN NR 1 ENGINE, ASSOCIATED WARNING LIGHT ALSO ILLUMINATED. COMPLETED PRATT AND WHITNEY MM 03-50-00, LOW OIL PRESSURE INSPECTION. REPLACED SCAVENGE FILTER. FOUND NR 1 ENGINE OIL COOLER LEAKING THROUGH FINS, REMOVED AND REPLACED OIL COOLER. OPERATIONAL AND LEAK CHECK GOOD. AIRCRAFT RETURNED TO SERVICE. (X)