As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB THE CREW REPORTED A PACK 1 FAIL WHILE THE NR 2 PACK WAS ON MEL. ACFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MX REMOVED AND REPLACED THE 4 HOSES ON THE TORQUE MOTOR DUAL VALVE, OPS AND LEAK CHECKED WITH NO DEFECTS, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.