As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) OIL NOTED LEAKING FROM LT ENGINE DRAIN MAST. INTEGRATED DRIVE GENERATOR REMOVED AND ACCESSORY DRIVE GARLOCK SEAL AND IDG SHAFT O-RING REPLACED. LEAK RETURNED AT DRAIN MAST TWO DAYS LATER. IDG WAS REMOVED AND INSPECTED. THE LEAK WAS DETERMINED TO ORIGINATE FROM THE INTEGRATED DRIVE GENERATOR CARBON SEAL. THIS IS AN ABNORMAL OCCURRENCE. IDG REPLACED WITH SERVICEABLE UNIT.