As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE THE FO S ALTIMETER IS 300 FEET OFF CAPTAIN S ALTIMETER AND 200 FEET OFF THE STANDBY ALTIMETER . PERFORMED PITOT/STATIC ADJ/TEST PER A300 AMM 34-10-00-5. FOUND F/O ALT READING SPLIT FROM CAPTIANS AND STANDBY. R/R'D #2 ADC PER A300 AMM 34-11-34-04. ALL ALTIMETERS NOW READ GOOD.