As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L1 DOOR VERY LOUD HOWLING DURING INITIAL DESCENT. PERFORMED TSM 52-11-00 PERFORMED INSPECTION OF THE DOOR SEAL AND FRAME FOUND UPPER L/H STRIP DAMAGED. COVER PLATE CHECK OK IAW AMM 52-10-00. REMOVED AND REPLACED DAMAGED STRIP IAW AMM 52-11-18. PERFORMED LEAK CHECK IAW AMM 05-53-00. NO LEAK NOTICED AT THIS TIME.