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A hawker be-400XP captain and first officer report about the right and left engine starter/generators dropping offline during descent. No annunciators; no engine instrument indication or radio available. Emergency (standby) battery power not available when selected. Maintenance found left generator had self-destructed and the generator control unit had failed.
| Attributes | |
| ACN | 1286188 |
| Time | |
| Date | 201508 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.TRACON |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | Beechjet 400 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Not Flying Captain |
| Person 2 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Inflight Event / Encounter Other / Unknown |
Narrative:
While reducing power for initial descent the master caution started flashing; we noted the right generator had fallen off line. After following abnormal check list we reset the right generator; after approximately 15 seconds the generator fell off line again. Approximately two minutes later the left generator fell off line; after completing memory items; both generators remained off-line. Continuing with the emergency checklist; we selected emergency power but there was no power available (there were no annunciators; engine instrument indication or radio available). We reselected main battery power and the right generator came back online jumping erratically between 50 and 220 amps. We elected to continue to the airport with the battery and generator on. After landing we turned off the generator and continued to the ramp on the battery. Once secured on the ramp we again tried the emergency power with the engines running and shut down; we found it to be working correctly.
Original NASA ASRS Text
Title: A Hawker BE-400XP Captain and First Officer report about the Right and Left Engine Starter/Generators dropping offline during descent. No annunciators; no engine instrument indication or radio available. Emergency (Standby) Battery power not available when selected. Maintenance found Left Generator had self-destructed and the Generator Control Unit had failed.
Narrative: While reducing power for initial descent the Master Caution started flashing; we noted the Right generator had fallen off line. After following abnormal check list we reset the Right generator; after approximately 15 seconds the generator fell off line again. Approximately two minutes later the Left generator fell off line; after completing memory items; both generators remained off-line. Continuing with the Emergency Checklist; we selected Emergency Power but there was no power available (there were no annunciators; engine instrument indication or radio available). We reselected Main Battery power and the Right generator came back online jumping erratically between 50 and 220 amps. We elected to continue to the airport with the battery and generator on. After landing we turned off the generator and continued to the ramp on the battery. Once secured on the ramp we again tried the Emergency Power with the engines running and shut down; we found it to be working correctly.
Data retrieved from NASA's ASRS site 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.