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Despite the best attempts of the flight crew; B757 suffers repeated generator off anomalies at start of takeoff roll. Return for maintenance.
| Attributes | |
| ACN | 795905 |
| Time | |
| Date | 200807 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : takeoff roll |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 795905 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Resolutory Action | flight crew : rejected takeoff other |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
During set-up initially contacted maintenance control regarding a right idg warning light not illuminated. Problem was resolved. New maintenance release received and taxied to runway 14R. All required checklists completed. When cleared for takeoff power advanced to 1.1 EPR left generator off light illuminated both utility busses shed. Takeoff aborted at less than 60 KTS; no airspeed indication. Taxied clear; contacted maintenance control; reset generator; all system appeared normal. Received new maintenance release from maintenance control. Received taxi clearance to runway 14R; accomplished the before takeoff checklist. When cleared for takeoff; crew agreed to manually hold brakes and apply power to 1.1 EPR in order to verify all normal. Parking brake was never set. At 1.1 EPR brakes were eased off and power advanced. I generator immediately shed with identical indications as first takeoff. Additionally; the red confign EICAS message and horn sounded. Takeoff was aborted and returned to gate.
Original NASA ASRS Text
Title: DESPITE THE BEST ATTEMPTS OF THE FLT CREW; B757 SUFFERS REPEATED GENERATOR OFF ANOMALIES AT START OF TKOF ROLL. RETURN FOR MAINT.
Narrative: DURING SET-UP INITIALLY CONTACTED MAINT CTL REGARDING A R IDG WARNING LIGHT NOT ILLUMINATED. PROB WAS RESOLVED. NEW MAINT RELEASE RECEIVED AND TAXIED TO RWY 14R. ALL REQUIRED CHKLISTS COMPLETED. WHEN CLRED FOR TKOF PWR ADVANCED TO 1.1 EPR L GENERATOR OFF LIGHT ILLUMINATED BOTH UTILITY BUSSES SHED. TKOF ABORTED AT LESS THAN 60 KTS; NO AIRSPD INDICATION. TAXIED CLR; CONTACTED MAINT CTL; RESET GENERATOR; ALL SYS APPEARED NORMAL. RECEIVED NEW MAINT RELEASE FROM MAINT CTL. RECEIVED TAXI CLRNC TO RWY 14R; ACCOMPLISHED THE BEFORE TKOF CHKLIST. WHEN CLRED FOR TKOF; CREW AGREED TO MANUALLY HOLD BRAKES AND APPLY PWR TO 1.1 EPR IN ORDER TO VERIFY ALL NORMAL. PARKING BRAKE WAS NEVER SET. AT 1.1 EPR BRAKES WERE EASED OFF AND PWR ADVANCED. I GENERATOR IMMEDIATELY SHED WITH IDENTICAL INDICATIONS AS FIRST TKOF. ADDITIONALLY; THE RED CONFIGN EICAS MESSAGE AND HORN SOUNDED. TKOF WAS ABORTED AND RETURNED TO GATE.
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.