As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VERY LOUD SQUEAL FROM CAPTAIN`S SIDE WINDOW. STARTED CLIMBING THROUGH 10,000 FT AND CONTINUED TO FL350. STOPPED DESCENDING THROUGH 14,000 FT, DIFFERENTIAL PRESSURE OF 6.3 PSI. THE FLIGHT DECLARED AN EMERGENCY AND RETURNED TO JFK WITHOUT FURTHER INCIDENT. REMOVED AND REPLACED L2 WINDOW AND SEAL AS PER AMM 56-11-11. NO LEAKS FOUND, OK FOR SERVICE. THE AIRCRAFT WAS GROUNDED.