As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO SHUTDOWN OF APU WITH NR 2 ENG DRIVEN GENERATOR ALREADY INOPERATIVE. CONFIRMED NO EXTERNAL OIL LEAKAGE. GEARBOX MODULE 756407J, S/N SP-G 970369 WAS PARTIALLY DISASSEMBLED FOR INSPECTION AND REPLACEMENT OF THE BEARING TABS AND AIR-OIL SEPARATOR SEAL. AIR-OIL SEPARATOR LIP SEAL WAS WORN, ALLOWING OIL TO BLOW BY.