B757 has generator fall offline on thrust advance. Takeoff aborted, twice.

Attributes
ACN	292991
Time
Date	199412
Day	Tue
Place
Locale Reference	airport : las
State Reference	NV
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : takeoff other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp pilot : cfi
Experience	flight time last 90 days : 135 flight time total : 10000 flight time type : 2200
ASRS Report	292991
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : atp
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : rejected takeoff
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

We were cleared for takeoff in las, nv, runway 25R. I brought the thrust levers up. At approximately 40 KTS, the right engine fell off line. I closed the thrust levers and rolled to the next turn off. We had a maintenance technician on board with us. (A company technician). We reset the generator, started the APU. The technician could not find any apparent reason for the generator falling offline. The reset was successful. We were cleared for takeoff again. At approximately 70 KTS the right generator fell offline again. I aborted the takeoff, went back to the gate. We checked brake cooling schedule and contacted maintenance. They found the right generator drive unit to be low on oil. The generator was put on MEL, our release amended to reflect revised fuel load and the MEL. We took off for phx, az, and landed without further problems.

Original NASA ASRS Text

Title: B757 HAS GENERATOR FALL OFFLINE ON THRUST ADVANCE. TKOF ABORTED, TWICE.

Narrative: WE WERE CLRED FOR TKOF IN LAS, NV, RWY 25R. I BROUGHT THE THRUST LEVERS UP. AT APPROX 40 KTS, THE R ENG FELL OFF LINE. I CLOSED THE THRUST LEVERS AND ROLLED TO THE NEXT TURN OFF. WE HAD A MAINT TECHNICIAN ON BOARD WITH US. (A COMPANY TECHNICIAN). WE RESET THE GENERATOR, STARTED THE APU. THE TECHNICIAN COULD NOT FIND ANY APPARENT REASON FOR THE GENERATOR FALLING OFFLINE. THE RESET WAS SUCCESSFUL. WE WERE CLRED FOR TKOF AGAIN. AT APPROX 70 KTS THE R GENERATOR FELL OFFLINE AGAIN. I ABORTED THE TKOF, WENT BACK TO THE GATE. WE CHKED BRAKE COOLING SCHEDULE AND CONTACTED MAINT. THEY FOUND THE R GENERATOR DRIVE UNIT TO BE LOW ON OIL. THE GENERATOR WAS PUT ON MEL, OUR RELEASE AMENDED TO REFLECT REVISED FUEL LOAD AND THE MEL. WE TOOK OFF FOR PHX, AZ, AND LANDED WITHOUT FURTHER PROBS.

Data retrieved from NASA's ASRS site as of July 2007 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.