As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1748 SJU-FLL, AIRCRAFT DIVERTED TO PLS DUE TO NR 1 IDG ADVISORY ON EICAS TEMPERATURE RAISED 150 DEG C TO AMBER FLASHING INDICATIONS OF 185 DEG C WHILE GEN 1 OFF AND IDG DISCONNECTED. REMOVED AND REPLACED ENGINE NR 1 IDG IAW AMM 24-21-51. OPS CHECK NORMAL.