As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX-#2 ENGINE OIL PRESSURE DROPPED DURING CLIMB OUT AS LOW AS 35 PSI. NO WARNING LIGHTS ASSOCIATED WITH LOW PRESSURE. WITH REDUCED POWER SETTING ON DESCENT PRSSURE RETURNED TO NORMAL. OPERATED #2 ENGINE AND FOUND OIL PRESSURE TO INDICATE A CONSTANT 55 PSI. REMOVED AND REPLACED #2 ENGINE OIL PRESSURE TRANSMITTER. OPERATED #2 ENGINE AND FOUND OIL PRESSURE INDICATING NORMAL AT 62 PSI. LEAK CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.