As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 4035 THE CREW REPORTED THAT THE CABIN ALTITUDE CLIMBED TO 10200 IN RED. THE CRE PERFORMED AN EMERGENCY DESCENT AND THE AIRCRAFT LANDED IN IAH WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT AND REMOVED AND REPLACED ABLOWN DUCT ON THE HEAT EXCHANGER, OPERATIONALLY TESTED WITH NO DEFECTS NOTED AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.