As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, UNABLE TO CONTROL CABIN ALTITUDE BELOW 10,000 FEET WITH PACK NR 1 AND NR 3 ON. DIVERTED TO JFK, LANDED WITHOUT INCIDENT. REPLACED BLOWN DUCT TO NR 3 AIR CONDITIONING PACK. LEAK CHECKED GOOD. PACK OPS CHECKED PER MM CHAPTER 21. (X)