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A B757-200 flight crew opted to divert to a nearby airport when multiple electrical system anomalies surfaced and subsided prior to the failure of the left engine generator.
| Attributes | |
| ACN | 855684 |
| Time | |
| Date | 200910 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent Initial Approach Final Approach |
| Route In Use | Direct |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | AC Generator/Alternator |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine |
| Experience | Air Traffic Control Military 22 Flight Crew Last 90 Days 125 Flight Crew Total 15000 Flight Crew Type 250 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Enroute we began experiencing random; spurious; electrical problems of equipment that would shutdown and restart; such as wx radar; cockpit lighting; DME; autot throttles; and other. Suspecting an electrical fault or bus fault problem but of unknown source and no defined procedure to isolate the problem(s); I elected to start the APU to provide backup power; declare an emergency; and land. During the approach phase the left gen failed and shortly after most problems disappeared. Captain's FMC also failed. First officer flew a CAT I ILS as captain's instruments were suspect. A safe landing and taxi-back to parking followed and maintenance debriefed.
Original NASA ASRS Text
Title: A B757-200 flight crew opted to divert to a nearby airport when multiple electrical system anomalies surfaced and subsided prior to the failure of the left engine generator.
Narrative: Enroute we began experiencing random; spurious; electrical problems of equipment that would shutdown and restart; such as wx radar; cockpit lighting; DME; autot Throttles; and other. Suspecting an electrical fault or bus fault problem but of unknown source and no defined procedure to isolate the problem(s); I elected to start the APU to provide backup power; declare an emergency; and land. During the approach phase the L GEN failed and shortly after most problems disappeared. Captain's FMC also failed. First Officer flew a CAT I ILS as Captain's instruments were suspect. A safe landing and taxi-back to parking followed and maintenance debriefed.
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.