As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) NO2 ENGINE OIL QUANTITY INDICATION DROPPED FROM 7.6 LITRES (2GAL) TO 3.8 LITRES (1GAL) DURING APPROACH TO LAND. INVESTIGATION FOUND THAT THE AUXILIARY GEARBOX LP5 FITTING THREAD WAS DAMAGED AND LOOSE. PERSONNEL/MAINTENANCE ERROR.