As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN PRESSURE NOT CONTROLLED ON DESCENT IN STANDBY MODE. AT 5.0 PRESSURE BUMP & CABIN CLIMBED TO MATCH ACFT ALT. NO TIME TO SELECT MANUAL. FOUND CABIN PRESSURE CONTROLLER FAILED. REPLACED CABIN PRESSURE CONTROLLER. ALL TESTS PERFORMED NORMALLY- NO REPEATS SINCE ORIGINAL.