As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A BLEED 2 LEAK MESSAGE AFTER TAKEOFF. THE QRH WAS FOLLOWED AND AFTER CLOSING THE NR 2 BLEED, THE MESSAGE CLEARED. THE AIRCRAFT RETURNED TO JFK AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE DUCT AND JOINT AT THE GROUND AIR CONNECTION LEAKING. THE O-RINGS AND DUCT AT THE GROUND AIR CONNECTION WERE REPLACED WITH NO FURTHER DEFECTS NOTED.