As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT, NR 1 ENGINE HAD RAPID QUANTITY AND PRESSURE DROP. SHUT DOWN NR 1 ENGINE PER AOM PROCEDURES AND LANDED WITHOUT INCIDENT. FOUND MAIN OIL PRESSURE LINE POPPED OUT OF COUPLING BRACKET AND RETAINING BOLTS SHEARED OFF. REMOVED BROKEN STUDS AND INSTALLED THREE HELICOILS REPAIR PER BOEING MM CH 79-21-00 AND 71-21-03. INSPECTED OIL FILTER AND CHIP DETECTOR NO DEFECTS NOTED, ACCOMPLISHED ENGINE RUN, OPS CHECKED AND LEAK CHECKED GOOD.