As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD SQUEAL AT F/O SLIDING WINDOW. CREW STATES LOUD SQUEAL IS COMING FROM RT SIDE ALONG HINGE ASSY. TAPED AREA AROUND AFT SIDE OF F/O'S SLIDING WINDOW. PLACED WINDOW ASSY IN LOB. STARTED INSTALLATION OF WINDOW 2R. INSTALLED WINDOW. F/O'S SLIDING WINDOW IS SQUEALING AGAIN. RMV'D FAULTY WINDOW. INSTALLED NEW NR 2 SLIDING WINDOW AND ADJUSTED. OP CHKS NORMAL.