As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE COWLING WAS OPENED TO INVESTIGATE LOSS OF OIL. 'FOUND THE TRANSFER GEARBOX OIL JET CLEAN OUT PLUG (CHAPTER 72-60-03, FIG 1, ITEM 25) UNSEATED AND HANGING ON ITS MOUNTING STUD'. LUBE OIL WAS VENTED OVERBOARD ONCE THE PLUG WAS UNSEATED. (X)