As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) LEFT ENGINE OIL QUANTITY DROPPED FROM 9 LITERS TO 3 LITERS IN APPROXIMATELY 30 MINUTES. MAINTENANCE CHECK FOUND LEFT GEARBOX FITTING TO OIL PRESSURE SWITCH LOOSE AND GEARBOX THREADS STRIPPED. RECTIFICATION INVOLVED INSTALLING A HELICOIL AS PER PRODUCTION PERMIT APPROVED BY POWERPLANT ENGINEERING. GROUND RUN AND LEAK CHECK CARRIED OUT.