Narrative:

This report is in regard to a return to blocks. The first officer and I flew this airplane for two legs. After engine start that morning the left generator did not come on line. I reached up to reset the generator and everything was normal throughout the remainder of the flight. During the start of the takeoff roll on the next flight the first officer pushed the throttles up to takeoff thrust and by the time I displaced his hands off the throttles we received a split second takeoff warning followed by a left generator tripping off line. I aborted the takeoff at around 75 KTS and we pulled off at the next intersection to contact maintenance. After discussing the problem and informing them of the left generator not coming on line that morning; he simply had us reset the generator once again. All systems returned to normal. The first officer and I had a brief discussion about the weather forecast (low visibility and low ceilings) and we decided it to be prudent to have maintenance look at the generator. We returned to the gate and maintenance came on board to ask us what had happened. After about 15-20 minutes we got a new airplane and proceeded to the gate for a normal flight. One thing the first officer and I found unusual was that during taxi back to the gate ground control asked us for the registration number of the airplane. In all my years of flying I have never been asked that or even heard of that being asked from a controller.

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Original NASA ASRS Text

Title: B757 flight crew reports the left generator failing to come on line after engine start. The generator is reset and flight departs. On the next takeoff the generator trips off as the crew is commencing the takeoff roll. The takeoff is rejected and flight returns to the gate for maintenance.

Narrative: This report is in regard to a return to blocks. The First Officer and I flew this airplane for two legs. After engine start that morning the left generator did not come on line. I reached up to reset the generator and everything was normal throughout the remainder of the flight. During the start of the takeoff roll on the next flight the First Officer pushed the throttles up to takeoff thrust and by the time I displaced his hands off the throttles we received a split second Takeoff Warning followed by a left generator tripping off line. I aborted the takeoff at around 75 KTS and we pulled off at the next intersection to contact Maintenance. After discussing the problem and informing them of the left generator not coming on line that morning; he simply had us reset the generator once again. All systems returned to normal. The First Officer and I had a brief discussion about the weather forecast (low visibility and low ceilings) and we decided it to be prudent to have Maintenance look at the generator. We returned to the gate and Maintenance came on board to ask us what had happened. After about 15-20 minutes we got a new airplane and proceeded to the gate for a normal flight. One thing the First Officer and I found unusual was that during taxi back to the gate Ground Control asked us for the registration number of the airplane. In all my years of flying I have never been asked that or even heard of that being asked from a Controller.

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.