As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT FROM MCO CREW REPORTED FUMES IN CABIN, THE RADAR WAS SPOKING, AND POSSIBLE RADOME ARCING. EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO MCO. MAINTENANCE REPLACED THE WEATHER RADAR ANTENNA AND TRANSCEIVER. RADAR OPERATION CHECKED NORMAL. RAN APU AND ENGINES WITH NO FUMES NOTED. ETOPS CATEGORY 'B': DIVERSION OR TURNBACK