As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT DECLARED AN EMERGENCY INTO CLT ON ACCOUNT OF PRESSURIZATION PROBLEM. OXYGEN MASKS DEPLOYED. FLIGHT LANDED WITHOUT INCIDENT. MAINTENANCE REPORTS PRESSURIZATION CONTROLLER #2 FAULT 21-31-34. REPLACED #2 CONTROLLER IAW TSM 21-31-00-810-827-A AND 810-809-A. PERFORMED OPERATIONAL TEST IAW AMM 21-31-00-710-002-A. NO FAULTS NOTED.