As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN PRESSURIZATION LOSS AT TOP OF DESCENT. CABIN PRESSURE EMERGENCY LIGHT ILLUMINATED, EMERGENCY PROCEDURE COMPLETED. NO FURTHER INCIDENT. PERFORMED BITE TEST PROCEDURES AND THE FOWARD CABIN PRESSURE CONTROLLER FAILED TEST. REPLACED FORWARD CABIN PRESSURE CONTROLLER IAW DC9 AMM 21-32-00-2-0501.