As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HUMMING NOISE AND VIBRATION IN CABIN AT ROW 21. NO SPECIFIC LOCATION NOTED. REPLACED WING TO BODY FAIRING SEALS PANEL 192DT REF AMM 53-35-11. VERIFIED SAFETY AND SECURITY OF PANEL INSTALLATION. OP CK OF EEL LIGHTING NORMAL. WING ROOT PANEL HAS EMERGENCY LIGHTING FOR OVER WING EXITS INSTALLED.