As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) DURING FLIGHT, THE RT ENGINE GAUGE DISPLAYED LOW OIL PRESSURE. ENGINE GROUND RUN WITH A CALIBRATED OIL PRESSURE GAUGE PLUMBED INTO SYSTEM WAS CARRIED OUT WITH NO FAULT FOUND. SUSPECTING IT COULD HAVE BEEN A SLUDGE PROBLEM IN THE PRESSURE LINE BETWEEN THE GAUGE AND ENGINE, THE LINE WAS PURGED AND REFILLED WITH CLEAN OIL.