What was found
AT 21000 FEET NOTICED CRACK IN FO SIDE WINDOW AND HEARD A SQUEAL. DIVERTED TO SEA . REMOVED FROM SERVICE. PERFORM A GVI ON FO SIDE WINDOW IAW E175 AMM 56-12-00-200-802-A, NO CRACKS, DELAMINATION OR SCRATCHES FOUND AT THIS MOMENT, NO FURTHER DEFECT NOTED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.