As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW OBSERVED THE ENGINE OIL PRESSURE TREND TO BE STEADILY DECREASING OVER A SHORT PERIOD OF TIME. AS AN EXPERIENCED OPERATOR OF THIS ENGINE, THIS TREND INDICATED A CRACKING PROBLEM WITH THE PLANETARY GEAR CARRIER IN THE ENGINE GEARBOX. THE ENGINE WAS REMOVED FOR INSPECTION AND AS SUSPECTED THE PLANETARY GEAR CARRIER ASSY HAD MULTIPLE CRACKS AND NEARING COMPLETE FAILURE. TO DATE OUR COMPANY HAS ISSUED SEVERAL SDR'S ON THIS SAME ISSUE.