What was found
DIVERTED DUE TO PRESSURIZATION ISSUES. CABIN ALTITUDE KEPT CLIMBING, CREW HAD TO MANUALLY CLOSE OUTFLOW VALVE, CABIN STILL CONTINUED TO CLIMB. GOT CABIN ALT ON OAP AND WARNING. EMERGENCY DESCENT. MX RAN WIRES FROM CABIN PRESSURE CONTROLLER TO OUTFLOW VALVE MOTORS. REPLACED BOTH CPC'S. REPLACED CABIN PRESSURE CONTROL PANEL IN COCKPIT IAW AMM. PRESSURIZED ACFT, FOUND AFT PRESSURE RELIEF VALVE REMAINS SLIGHTLY OPEN DUE TO DEBRIS. REMOVED DEBRIS AND RESET VALVE. PERFORMED VERIFICATION FLIGHT.