B767-300 and 300 ER
Flight Crew Air Transport Pilot (ATP)
Flight Crew Total 13000
Aircraft Equipment Problem Critical
Flight Crew Diverted; Flight Crew Landed As Precaution; General Declared Emergency
Aircraft
The right generator drive disconnect light prompted us to accomplish the tasks from the QRH. The APU was placarded inoperative. We declared an emergency and landed at [a nearby suitable airport]. The Dispatcher and Maintenance were in constant loop during and after the event.
APU was placarded inoperative. In cruise flight from New York to [a South American destination] at FL370 the 'R GEN DRIVE' light illuminated on the EICAS; along with the 'DRIVE' light on the overhead panel. QRH procedures were followed and the Gen Drive was disconnected. All buses remained powered at all times and the aircraft was now down to one generator. The Captain was summoned from his break; Dispatch was contacted; Maintenance was consulted; an emergency was declared; and we landed at the nearest suitable airport; in accordance with the QRH directive. Approach and landing were normal.
B767-300 flight crew reported losing the right generator in cruise flight on an international segment. Since they departed with the APU inoperative; they diverted to the nearest suitable airport in accordance with the QRH.