As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX FLIGHT NR 2139 CLIMBING THROUGH ABOUT 14000', RECEIVED A MASTER WARNING NR 2 OIL PRESSURE LIGHT, OIL PRESSURE FLUCTUATING ERRATICALLY ABOVE AND BELOW 55 PSI. EVENTUALLY WAS STEADILY BELOW 55 PSI. SHUTDOWN NR 1 AS PER CHECKLIST, INITIALLY LEFT ENGINE IN START FEATHER AS PER CHECKLIST. THEN DROPPED BELOW 55 PSI AND COMPLETELY SHUTDOWN ENGINE NR 2 SPU AUX POWER CAUTION LIGHT DID NOT ILLUMINATE, EMERGENCY CHECKLIST SAYS IT SHOULD. REPLACED NR 2 ENGINE. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.