As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK - FLT 763 - RIGHT AIR CONDITIONER PACK FAILED AFTER TAKEOFF. THIRTY-FIVE MINUTES AFTER TAKEOFF, PACK VALVE OPENED TO 10 PSI. SIX MINUTES LATER, VALVE OPENED COMPLETELY. PACK THEN FAILED ON LANDING. REPLACED AIR PRESSURE REGULATOR VALVE P/N 293-0033. OP-15. 10-01-97. NEW. (X)