As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKE-OFF ROLL, THERE WAS AIR NOISE COMING FROM CAPTAINS SLIDING WINDOW. DURING EARLY CLIMB, AIR NOISE BECAME EXTREMELY LOUD SQUEAL. THE FLIGHT DECLARED AN EMERGENCY AND RETURNED TO FIELD AUS WITHOUT FURTHER INCIDENT. MAINTENANCE ADJUSTED CAPTAINS OPENABLE WINDOW FORWARD STOP PER AMM 56-12-11. PRESSURE CHECK GOOD PER AMM 05-51-91. OK FOR SERVICE. THE AIRCRAFT WAS GROUNDED.