As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FO SIDE WINDOW WONT SEAL.MIC JACK SUSPECTED UPON RETURN TO GATE,INSPECTED THE FO SLIDING WINDOW AND FOUND THE FO BOOM MIC JACKS STUCK BETWEEN THE SLIDING WINDOW AND FRAME CAUSING THE SQUEAL. INSPECTED THE WINDOW FRAME AND WINDOW SEAL, NO DEFECTS NOTED.