As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE TO MEXICO, THE NR 2 OIL QUANTITY DECREASED TO ZERO FOLLOWED BY A DROP IN OIL PRESSURE. PRECAUTIONARY SHUT DOWN NR 2 ENGINE. AIRCRAFT DIVERTED BACK TO MMMD AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED NR 2 ENGINE AND FOUND NR 4 BEARING CHIP METAL DETECTOR OFF. RE-INSTALLED CHIP DETECTOR PLUG LEAK CHECK GOOD IAW MM 72-00 AND PWA SERVICE BULLETIN 39-08. ENGINE SERVICED PER MM 12-13-1. AIRCRAFT RETURNED BACK TO SERVICE. (M)