What was found
CAPT FWD WINDOW SQUEAL AT TOP MIDDLE THIRD OF WINDOW JUST BELOW FRAME. IAW CREW, BETWEEN 33000FT AND 35000 FT 7.9 DIFF PSI TO 8.0 DIFF PSI. NOISE HAPPENS AT LOCATION SPECIFIED. BELOW 33,000 FT 7.9 DIFF PSI OR LESS NOISE GOES AWAY. REMOVED CAPT WINDOW, INSTALLED NEW WINDOW. NEED TO INSTALL CTR RETAINER, TORQUE ALL FASTENERS, RESEAL AND INSTALL FLIGHT DECK SHROUDS. SQUEAL RETURNED. REPLACED CAPTS WINDSHIELD (2ND TIME).