As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE LOW PRESSURE VIBRATION HIGHER THAN NORMAL BUT NOT IN AMBER DURING DESCENT, AFTER LANDING OIL PRESSURE DECREASED STEADILY, AT 32% INDICATION TURNED RED AND RECEIVED LOW OIL PRESSURE WARNING. AFTER COMPLETION OF CHECKLIST WHEN ENGINE WAS AT 17% IT WAS SHUT DOWN. REMOVED AND REPLACED NR 1 ENGINE.