As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN PRESSURE RISED TO 11230 FT. SAFETY VALVE YELLOW & OPEN. OUTFLOW VALVE YELLOW & OPEN. PERFORMED STEEP DESCENT TO EQUAL OUT PRESSURE. PERFORMED TSM TASK 21-31- 00-810-809-A. PRESSURIZED ACFT TO 4.06 PSID FOR 10 MINUTES. NO LEAKS OR DEFECTS NOTED. PERFORMED MCDU TEST OF CPC 2. CIDS SHOWS LONG HISTORY OF CPC2 FAULTS. REMOVED ADN REPLACED CPC2 IAW AMM 05-53-00-780-001-A01, AMM 21-31-34-000-001-A & AMM 21-31-00-710-002, 21-31-00-710-002-A.