As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) IT WAS REPORTED THAT THE ENGINE HAD AN IFSD DUE TO LOP. THE INCIDENT HAPPENED AT ALTITUDE OF ABOUT 20K , THE CREWS NOTICED AN ENGINE NR 1 OIL PRESSURE INDICATING 25 PSI. NO MASTER WARNING FOR OIL PRESSURE AND THE CREW ELECTED TO SHUT DOWN NR 1 ENGINE. AIRCRAFT RETURNED AND LANDED UNEVENTFULLY. TROUBLESHOOTING ONGOING.