What was found
PDX - ON CLIMB-OUT OF SEA OIL PRESSURE NEEDLE HAD NO INDICATION AND NUMERICAL VALUE HAD DASHES. NO WARNING LIGHT ILLUMINATED. DESCENDING- NEEDLE AND NUMERICAL VALUE REAPPEARED WITH IN NORMAL PARAMETERS. NR 2 ENGINE. DIVERTED TO PDX. ACCOMPLISHED A UNEVENTFUL LANDING. UPON FURTHER INVESTIGATION, FOUND UNKNOWN FLUID IN THE OIL PRESSURE TRANSDUCER CONNECTOR AT TRANSDUCER, CLEANED CONNECTOR REMOVED AND REPLACED THE NR 2 ENGINE OIL PRESSURE TRANSDUCER PER Q400AMM TASKS 79-31-01-000-801 AND 79-31-01-400-801, OPS TEST AND LEAK CHECK GOOD. PERFORMED AIRCRAFT TAXI CHECK TO REPLICATE DISCREPANCY FOR APPROX 15 MINUTES, DISCREPANCY DID NOT REOCCUR. RETURNED TO SERVICE.