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During takeoff; aircraft experienced an electrical malfunction; declared an emergency; and returned to land.
| Attributes | |
| ACN | 1074423 |
| Time | |
| Date | 201303 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Electrical Power |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
On takeoff roll; amber master caution light illuminated from an unknown source. Takeoff continued. At liftoff the number 1 transfer bus open light illuminated. Transfer bus was opening and closing rapidly; causing multiple primary instrument and navigation mode failures. Advised ATC and leveled off at 6;000 ft. Identified the light in the QRH and ran appropriate QRH checklist. Problem momentarily stopped and went into holding to burn off fuel to prevent an overweight landing. At that time the problem reoccurred with the bus continually cycling on and off; causing additional flight instrument and navigation failures. Elected to declare an emergency at that time and returned to the field; making an uneventful overweight landing. Upon landing the emergency was terminated; and taxied to the gate.
Original NASA ASRS Text
Title: During takeoff; aircraft experienced an electrical malfunction; declared an emergency; and returned to land.
Narrative: On takeoff roll; amber master caution light illuminated from an unknown source. Takeoff continued. At liftoff the number 1 transfer bus open light illuminated. Transfer bus was opening and closing rapidly; causing multiple primary instrument and navigation mode failures. Advised ATC and leveled off at 6;000 FT. Identified the light in the QRH and ran appropriate QRH checklist. Problem momentarily stopped and went into holding to burn off fuel to prevent an overweight landing. At that time the problem reoccurred with the bus continually cycling on and off; causing additional flight instrument and navigation failures. Elected to declare an emergency at that time and returned to the field; making an uneventful overweight landing. Upon landing the emergency was terminated; and taxied to the gate.
Data retrieved from NASA's ASRS site as of July 2013 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.