As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH 4000 FEET AIRCRAFT HAD AN AIRFRAME VIBRATION. ENGINE PARAMETERS WERE INDICATING NORMAL. AT ARRIVAL MAINTENANCE REPS IDENTIFIED #2 ENGINE MAINTENANCE PLATFORM DOORS DAMAGED. REMOVED TAIL CONE REFERENCE MD-11 AMM 53-52-00. REPLACED DAMAGED TAIL CONE REFERENCE MD-11 AMM 53-52-00. NOTE: LEFT AND RIGHT PATIO DOORS ARE A PART OF THE TAIL CONE ASSEMBLY.