As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AN OIL LEAK HAD DEVELOPED ON THE LT SIDE OF THE UPPER TRANSMISSION DECK. IT WAS OBSERVED THAT THE OIL LEAK WAS ORIGINATING FROM A CRACK IN THE RADII TRANSITION AREA OF THE CASE BETWEEN THE LT MAIN INPUT AND PORTION OF THE LOWER CASE.