As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CLIMB-OUT AT 280, LEFT GEN DRIVE LIGHT CAME ON. DRIVE WAS DISCONNECTED IAW OPS MANUAL. LEFT ENGINE IDG INOP AS PER MEL 24-1 AUTH 4-139DC-B, ENTERED IN MIC. REPLACED LT IDG, CHECKS OK ON RUN UP, LEAK CHECKS OK. REMOVED PLAC 4-139DC-B CLEARED MIC. (M)