As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SHORLTY AFTER TAKE OFF THE NR 2 ALTIMETER BAROMETRIC SETTING ROLLED BACK TO THE PREVIOUS INPUT SETTING. BAROMETRIC PRESSURE WAS RESET AND REMAIN NORMAL FOR THE DURATION OF THE FLIGHT. AIR DATA COMPUTER WAS REPLACED WITH A SERVICEABLE UNIT.