What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED INBOUND INTO XNA THE FLIGHT CREW REPORTED THAT DURING CLIMB OUT OF DFW A CABIN PRESSURE SYSTEM 1 ECAM FAULT MESSAGE DISPLAYED. THEN AT THE TOP OF DESCENT AT FL270 CABIN PRESSURE SYSTEM 1 AND 2 FAILED IN AUTO MODE. THE FLIGHT CREW MANUALLY CONTROLLED THE OUTFLOW VALVE AND LANDED AT XNA WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND INSULATION / DEBRIS INTERFERING WITH THE OUTFLOW VALVE AND REMOVED THE OBSTRUCTION. AN INSPECTION OF ZONE 170 BEHIND THE AFT CARGO WAS ACCOMPLISHED WITH NO DEFECTS FOUND. A SATISFACTORY OPERATIONAL CHECK OF THE CABIN PRESSURIZATION SYSTEM WITH NO ISSUES NOTED.