What was found
(CAN) CREW REPORTED APPROXIMATELY 30 MINUTES FROM DESTINATION, THAT NR 2 ENGINE OIL PRESSURE HAD DROPPED BELOW MINIMUM. CREW ELECTED TO PERFORM IN FLIGHT SHUT DOWN. CREW REQUESTED CFR AND LANDED WITHOUT INCIDENT. INSPECTION REVEALED NR 2 ENGINE 2 QTS LOW WITH NO SOURCE OF OIL LEAKS. AGB CHIP DETECTOR REVEALED SOME METAL DEBRIS. CHIP DETECTOR TROUBLESHOOTING KIT WAS INSTALLED AND SECOND INSPECTION OF THE CHIP DETECTOR REVEALED A SIGNIFICANT AMOUNT OF METAL. A BOROSCOPE INSPECTION REVEALED THAT THE AXIS P GEAR WAS MISSING TEETH AND THAT THE AXIS B-B GEAR WAS HEAVILY WORN. LAB ANALYSIS OF THE REMOVED DEBRIS CONFIRMED TO BE M50 MATERIAL. ENGINE WAS REPLACED.