As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE OFF, AND DURING LANDING GEAR RETRACTION. A LIGHT AIRFRAME VIBRATION AND RIGHT YAW WAS OBSERVED. SHORTLY AFTER, NR 4 ENGINE N1 EXCEEDENCE WAS OBSERVED, PERFORMED PRECAUTIONARY NR 4 ENGINE SEVERE DAMAGE CHECKLIST. FOUND ENGINE AT FAULT, REMOVED AND REPLACED THE NR 4 ENGINE IAW AMM 71-00-00. OPS CHECKED SATISFACTORY.