As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TIP OF LOWER ATC ANTENNA FOUND BROKEN OFF. DEFERRED BY MAINTENANCE PROCEDURES. AIRCRAFT DEPARTED AND CREW HAD AN ATC FAULT MESSAGE. AIRCRAFT RETURN TO BLOCK AND WAS GROUNDED. REMOVED AND REPLACED ATCD ANTENNA, IAW AMM 34-53-03. AIRCRAFT RELEASED FOR FLIGHT.