What was found
CLIMBING THROUGH 18,000' AND 6 PSI DIFFERENTIAL. A LOUD SQUEAL BEGAN FROM ONE OF THE CAPTAIN SIDE WINDOWS. DIFFICULT TO ASCERTAIN WHICH WINDOW BUT IT SEEMINGLY IS LOUDEST FROM THE L2 WINDOW. FUEL JETTISON ACCOMPLISHED AND RETURN TO ZAZ.(<P>WINDOW NO 2 LH REPLACED IAW AMM 56-11-02. CABIN PRESSURE LEAKAGE TEST PERFORMED IAW AMM 05-51--08/201. REPLACED RH WINDSHIELD WASHER NOZZLE CHECK VALVE IAW AMM 30-44-00. RH WINDSHIELD WASHER SOLENOID REPLACED IAW AMM 30-44-01. </P>)