As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD (VERY LOUD) NOISE COMING FROM ACFT RT EMERGENCY EXIT WINDOW. REMOVED RT OVERWING EXIT DOOR IAW ACFT MM. INSPECTED DOOR SEAL. FOUND FWD UPPER CORNER OUT OF PLACE. REINSTALLED SEAL ON EXIT DOOR. PERFORMED LEAK CHECK/ PRESSURIZATION. NO LEAKS NOTED.