As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)WHILE MONITORING AIRCRAFT OIL CONSUMPTION IT WAS FOUND THAT THE COMBINING GEARBOX OIL WAS TRANSFERRING TO #2 ENGINE. THE GEARBOX WAS REMOVED AND THE PROBLEM WAS CAUSED BY THE ROTATION OF A WORN CARBONSEAL ROTATING IN THE RETAINER (P/N 3023913), WEARING THE RETAINER AND LEAVING OIL TO POSSIBLY TRANSFER TO THE POWER SECTION.