As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED GPWS FAIL, TERRAIN INOP, AND RADIO ALTIMETER 1 FAIL MESSAGES AND DIVERTED TO CMH DUE TO WEATHER WHERE THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE NR 1 RADIO ALTIMETER COMPUTER WITH NO FURTHER DEFECTS NOTED.