As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER BOTH ENGINES STARTED, ATTEMPTED TO PUT THE NR 1 GENERATOR ONLINE, BUT IT WOULD NOT GO ONLINE. JUST BLUE GEN OFF BUSS LIGHT REMAIN ILLUMINATED. THE NR 1 GEN SHOWED ZERO AMPS AND ZERO VOLTS. ACFT GROUNDED. REMOVED AND REPLACED THE NR 1 IDG IAW AMM 24-11-11. IDLE RUNS GOOD, OPS CHECKED NORMAL.