As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COCKPIT AIR NOISE STILL TOO LOUD WORSE ON THE GROUND. CREW REPORTED MOST INFLIGHT NOISE COMING FROM UPPER WINDSHIELD VENTS. RT RECIRCULATION FAN IS INOPERATIVE. CLEANED SCAT HOSE AND RESEATED DIFFUSER IAW MM. ACCOMPLISHED BY AMT NR 600486 AND INSP NR Q848 ON WORKCARD NR 2377N00003.