As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LEVEL-OFF AT FL 350, NR 4 ENGINE OIL PRESSURE LIGHT STARTED FLICKERING WITH SHORT PERIODS OF BEING ON STEADY. RETARDED NR 4 THROTTLE AND LOW PRESSURE LIGHT REMAINED ONSTEADY. SHUT NR 4 ENGINE DOWN. REPLACED OIL DIFFERENTIAL PRESSURE SWITCH. OPS CHECKED GOOD.