As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: REJECTED TAKE OFF AT 90 KNOTS DUE TO LOUD SQUEAL FROM FLIGHT DECK WIDOW. SLIDING WIDOW WAS NOT SECURED. RETURNED TO GATE FOR EMERGENCY APPLICATION OF BRAKES INSPECTION. SATISFACTORY BRAKE INSPECTION ACCOMPLISHED PER AMM 05-51-16-200-001-A.