As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE, STRANGE NOISE COMING FROM THE LT OVERHEAD PANEL. NO ABNORMAL CONTROL RESPONSES. ELECTED TO DIVERT TO NEAREST AIRPORT. MX DISCOVERED A 4-5 INCH SECTION OF LT WINDOW SEALANT HAD COME LOOSE AND WAS SLAPPING ON THE TOP OF THE CABIN. TRIM REPAIRED, FLIGHT CARRIED ON.