As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FORTY-FIVE MINUTES OUT OF SAN JUAN, GOT LEFT GENERATOR DRIVE LIGHT WITH 'L' IDG OIL TEMP STATUS MSG. DISCONNECTED CSD. STARTED APU, BUT APU GENERATOR BREAKER WOULD NOT PUT GENERATOR ON LINE. RETURNED TO SJU. REPLACED LEFT GCU AND IDG. LEAK AND OPS CHECK GOOD.