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A MD80 had two momentary electrical power interruptions after takeoff causing the loss of both pilot's airspeeds; the first officer's EFIS; the autothrottle/autopilot and EPR gauges. Systems returned to normal but later at cruise another interruption occurred so an emergency was declared and the flight diverted to an enroute airport.
| Attributes | |
| ACN | 903586 |
| Time | |
| Date | 201008 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
After an IFR departure we had two momentary electrical power interruptions that caused flags on captain and first officer's airspeed and loss of first officer's EFIS and EPR gauges and flickering of lights in the cabin and knocked off the auto throttles on first officer's dfcg. We switched to captain's dfcg and regained autothrottles and attempted to start the APU and had the APU low oil pressure light on with an APU fault light; also. As a precaution; we opened the AC x-tie. All other generator indications and CSD temperatures were normal. We were now in VMC on top at FL310 with normal electrical indications. Near an enroute airport we had another momentary power interruption and decided to divert; declared an emergency and landed.
Original NASA ASRS Text
Title: A MD80 had two momentary electrical power interruptions after takeoff causing the loss of both pilot's airspeeds; the First Officer's EFIS; the autothrottle/autopilot and EPR gauges. Systems returned to normal but later at cruise another interruption occurred so an emergency was declared and the flight diverted to an enroute airport.
Narrative: After an IFR departure we had two momentary electrical power interruptions that caused flags on Captain and First Officer's airspeed and loss of First Officer's EFIS and EPR gauges and flickering of lights in the cabin and knocked off the auto throttles on First Officer's DFCG. We switched to Captain's DFCG and regained autothrottles and attempted to start the APU and had the APU low oil pressure light on with an APU fault light; also. As a precaution; we opened the AC X-tie. All other generator indications and CSD temperatures were normal. We were now in VMC on top at FL310 with normal electrical indications. Near an enroute airport we had another momentary power interruption and decided to divert; declared an emergency and landed.
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.