As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN PRESSURIZATION FAILED IN DESCENT INTO BHM. APPROX 15000FT PRESSURIZATION BECAME ERRATIC AND CABIN ALT STARTED TO INCREASE. AT 8500FT AMBER CABIN ALT THEN RED CABIN ALT. RAN QRC/ARH FOR CABIN ALT. REMOVED AND REPLACED NR 2 SAFTEY VALVE IAW AMM 21-32-03-000/400-801. COMPLETED FUNCTIONAL TEST OF NUMBER 2 (RH) SAFETY VALVE IAW AMM 21-32-03-720-802. FUNCTIONAL TEST GOOD, NO FURTHER DEFECTS NOTED