As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON A ROUTINE FLIGHT, THE CREW NOTICED THE LT ALTIMETER UNSERVICEABLE, STUCK IN THE DESCENT. THE RT SYSTEM WAS USED TO CONTINUE THE DECENT AND THE FLIGHT CONTINUED WITHOUT INCIDENT. MAINTENANCE DISCOVERED A FAULTY AIR DATA COMPUTER, THE COMPUTER WAS REPLACED AND THE SYSTEM FUNCTION CHECKED SERVICEABLE.