As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT DURING CLIMB THERE WAS A LOUD RUSHING AIR NOISE IN THE PASSENGER CABIN. THE CREW SELECTED PACK NUMBER 1 OFF AND THE NOISE CLEARED. PACK NUMBER 2 WAS ALREADY ON DEFERRAL AND THE CREW DECIDED TO RETURN TO KLGA. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED A CLAMP AND DAMAGED SLEEVE ON THE PACK NUMBER 1 ASSEMBLY. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.