Narrative:

Left generator drive illuminated on takeoff. Generator disconnected per FM. Consulted with dispatch and maintenance. Divert to ZZZ1 required declaring an emergency so as to gain frequency access prior to entering ETOPS airspace. Overweight landing ZZZ1. Supplemental information from acn 805390: approximately 10 mins after takeoff out of ZZZ I was called by the captain and told that we had lost a generator and would not be able to continue to destination and would most likely be going to ZZZ1 to see if it could be repaired. We had about 20 mins but was not considered an emergency.

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Original NASA ASRS Text

Title: A B757-200 FLT CREW EXPERIENCED LOSS OF L GEN DRIVE ON DEPARTURE FOR AN TRANSOCEANIC FLT. THEY CONSULTED WITH MAINT; DECLARED AN EMERGENCY; AND DIVERTED TO THE NEAREST SUITABLE AIRPORT.

Narrative: L GENERATOR DRIVE ILLUMINATED ON TKOF. GENERATOR DISCONNECTED PER FM. CONSULTED WITH DISPATCH AND MAINT. DIVERT TO ZZZ1 REQUIRED DECLARING AN EMER SO AS TO GAIN FREQ ACCESS PRIOR TO ENTERING ETOPS AIRSPACE. OVERWT LNDG ZZZ1. SUPPLEMENTAL INFO FROM ACN 805390: APPROX 10 MINS AFTER TKOF OUT OF ZZZ I WAS CALLED BY THE CAPT AND TOLD THAT WE HAD LOST A GENERATOR AND WOULD NOT BE ABLE TO CONTINUE TO DEST AND WOULD MOST LIKELY BE GOING TO ZZZ1 TO SEE IF IT COULD BE REPAIRED. WE HAD ABOUT 20 MINS BUT WAS NOT CONSIDERED AN EMER.

Data retrieved from NASA's ASRS site as of May 2009 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.