As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOST CPCS AT FL300, AUTO PRESSURIZATION MODE FAILED. REPLACED 2097H020900 OUTFLOW VALUE - AFT PRE FL350 MOD S/N 01214 AND REPLACED 2099J030900 OUTFLOW VALUE - FWD PRE FL350 MOD S/N 01452 BOTH FROM LIEBHERR COMPANY AS REMOVED SERVICEABLE.