What was found
CREW REPORT: UNBEARABLE HI PITCH NOISE IN COCKPIT REPEAT GRIPE. FO'S SLIDING WINDOW SEAL HAS A 1" TEAR AT THE UPPER AFT CORNER. RPLC'D SEAL. REQUIRES SEALANT APPLIED PER AMM. SEALANT TO BE APPLIED WITHIN 50 HRS. PCN FOR QUICK SETTING SEALANT IS 841-0750. ACCMP RETORQUE OF COCKPIT WINDSHIELDS 1L AND 1R PER AMM ON ACCNT SUSPECTED OF BEING SOURCE OF HIGH PITCH NOISE. RETORQUED 1L & 1R COCKPIT WINDOWS PER AMM. PRESSURIZED ACFT PER AMM, NO LEAKS OR NOISE NOTED.