As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: ON DESCENT, AUTO FAIL AND ALTN LIGHTS ILLUMINATED ON PRESSURE CONTROL.***SUPPLEMENTAL ACTION SECT 4 AND 5: ACCOMPLISHED FIM 21-31-00-810, 803, 809 , AND 824. REPLACED NO.1 CAB PRESS CONTROLLER IAW AMM 21-31-01.***(CLOSED)