As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN DEPRESSURIZED DURING DESCENT. SAFETY VALVES OPEN AMBER INDICATION ON CABIN PRESSURE PAGE. OUTFLOW VALVE AND SAFETY VALVE BOTH FULLY OPEN AT 6000'. MAINTENANCE: PERFORMED BIT TEST CHECKS OF BOTH CABIN PRESSURE CONTROLLERS PER AMM 21-31-00 AND NO FAULTS NOTED.