As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING A PREFLIGHT INSPECTION, OIL WAS NOTICED TO BE EXCESSIVELY LEAKING AT OIL SCAVENGE LINE FITTING ATTACHING SCAVENGER LINE TO ACCESSORY GEARBOX. FITTING WAS FOUND TO BE LOOSE. UPON FURTHER INVESTIGATION FITTING WAS FOUND TO BE STRIPPED. ACCESSORY GEARBOX WAS REMOVED FROM ENGINE FOR REPAIR.