As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON APR 18, ACFT 728, WHILE FLYING ENROUTE, THE FLIGHT CREW HAD A NR 2 ENGINE LOW PRESSSSURE LIGHT ILLUMINATED, AND OIL QTY DROPPPED TO ZERO. NR 2 ENG WAS SHUTDOWN AND ACFT RETURNED TO DEPARTURE. MAINTENANCE FOUND METAL IN THE MAIN OIL FILTER. GEARBOX REPLACED, ENG RUNS CARRIED OUT AND OIL FILTERS CHECKED. ACFT RETUNED TO SERVICE.