As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT# 754, SJU-FLL. (AIRCRAFT RTF TO SJU, AN EMERGENCY WAS DECLARED) "AFTER TAKEOFF WE RECIEVED AN ECAM FOR TRANSPONDER 2 + THE FO'S MAP DISAPPEARD THEN WE SMELL A VERY STRONG ELECTRICAL BURNING SMELL; FOUND ATC TRANSPONDER COMPUTER WITHIN BURNT SMELL REMREP #2 XPDR-ATC 2 PER AMM 34-52-33-000-001. ACCOMPLISHED TSM INFO NOTICE 2017-TO150ODOR FOUND TOI BE TYPE 9"