Narrative:

Approximately one hour after takeoff; at cruise; a 'right gen drive' EICAS message was displayed along with the associated light on the overhead panel. Knowing that there had been a previous writeup indicating that the light and warning had appeared for about 5 seconds; we waited a few seconds and then took out the airplane flight manual. We carefully ran the checklist; ultimately disconnecting the idg. The gen drive light was on for somewhere between 1 to 2 minutes before we actually disconnected the drive. Continuing to follow the checklist; we started the APU in order to restore electrical power. We then contacted dispatch; who then patched in maintenance control. Together we decided to not continue into an ETOPS operation without the generator. We then returned to our departure airport without further incident.

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Original NASA ASRS Text

Title: A B767-300 on an ETOPS flight returned to their departure airport when the Right Generator Drive failed and had to be disconnected.

Narrative: Approximately one hour after takeoff; at cruise; a 'R GEN DRIVE' EICAS message was displayed along with the associated light on the overhead panel. Knowing that there had been a previous writeup indicating that the light and warning had appeared for about 5 seconds; we waited a few seconds and then took out the Airplane flight manual. We carefully ran the checklist; ultimately disconnecting the IDG. The GEN DRIVE light was on for somewhere between 1 to 2 minutes before we actually disconnected the drive. Continuing to follow the checklist; we started the APU in order to restore electrical power. We then contacted Dispatch; who then patched in Maintenance Control. Together we decided to not continue into an ETOPS operation without the generator. We then returned to our departure airport without further incident.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.