As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EICAS MESSAGE LEFT GENERATOR OFF DISPLAYED, OIL LIGHT ILLUMINATED. GENERATOR SWITCH RESET DID NOT CORRECT CONDITION. APU SHUT DOWN AT TOP OF DESCENT, FOLLOWED PROCEDURES WOULD NOT RESET. RESTARTED ON VECTORS FOR THE APPROACH INTO IND, EMERGENCY AIR DIVERSION. REMOVED AND REPLACED LEFT IDG IAW B767 AMM 24-11-01-4. PERFORMED APU BITE PROCEDURE IAW B767 AMM 49-11-00-12, FIGURE 103. SYSTEM CHECKED GOOD.