As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB A RUMBLING SOUND DEVELOPED IN THE FRONT LEFT FLIGHT DECK AREA WHICH DEVELOPED INTO A LOUD SQUEAL. EMERGENCY DECLARED. LANDING UNEVENTFUL. EMERGENCY DECLARED. MAINTENANCE FOUND THE CAPTAINS SLIDING WINDOW DRAIN TUBE NOT SECURE. SECURED THE DRAIN TUBE IAW AMM 56-11-11. ACCOMPLISHED PRESSURIZATION CHECK IAW AMM 05-51-91. SYSTEM CHECKED NORMAL.