As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 215 EWR-SJU, ON TAXI IN, SHUT NR 2 ENGINE DOWN AND HAD COMPLETE ELECTRICAL FAILURE BATTERY POWER ONLY. RECYCLED GEN 1 NO LUCK ENGINE NR 1 STILL RUNNING BATTERY POWER. 2 APU START ATTEMPTS NO SUCCESS BATTERIES DIED TURNED TO GATE. REMOVED AND REPLACED NR 1 ENGINE IDG PER AMM 24-21-51-04-13. LEAK & OPS CHECKS GOOD.