As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO PRESSURIZATION CNTRL 2 STARTED GETTING LARGE SWINGS IN CABIN RATE APPROACHING MAX DIFF THEN BACK DOWN(<P>RAN FIM 21-31 FT 803. RECEIVED CONTROLLER FAILURE ON CABIN AUTO 2. REMOVED AND REPLACED CONTROLLER IAW AMM 21-31-02. OPS CHECK NORMAL. STATUS MSG CLEARED.<BR /></P>)