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B757 flight crew experienced electrical and system anomalies shortly after takeoff. During discussions with maintenance and passing FL200 the left hydraulic pump failed. The crew fearing further failures were emanate; declared an emergency and returned to their departure airport with no additional failures.
| Attributes | |
| ACN | 851405 |
| Time | |
| Date | 200909 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Electrical Distribution Busbar |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Person 2 | |
| Function | Pilot Flying Captain |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Inflight Event / Encounter Weather / Turbulence |
Narrative:
At 1500 ft AGL after takeoff captain called for 'VNAV; flaps 5.' I selected VNAV; and it would not engage. Flight director remained in to/to and auto-throttles would not engage. We selected flch and continued the climb. Shortly after flap retraction we had an EICAS message 'left elec hydraulic pump' and the associated pump 'press' light was illuminated. I flew the aircraft while the captain called maintenance and discussed the situation. We were quickly out of radio range and captain initiated a phone patch with maintenance control. Reception was intermittent and the captain elected to return to departure airport. We were deviating for weather and it took some time to turn around. We reviewed the QRH but no checklist was relevant. The landing was uneventful. The aircraft had a previous history of issues with auto-throttles and MCP.
Original NASA ASRS Text
Title: B757 flight crew experienced electrical and system anomalies shortly after takeoff. During discussions with Maintenance and passing FL200 the left hydraulic pump failed. The crew fearing further failures were emanate; declared an emergency and returned to their departure airport with no additional failures.
Narrative: At 1500 FT AGL after takeoff Captain called for 'VNAV; Flaps 5.' I selected VNAV; and it would not engage. Flight director remained in TO/TO and auto-throttles would not engage. We selected FLCH and continued the climb. Shortly after flap retraction we had an EICAS message 'L ELEC HYD PUMP' and the associated pump 'PRESS' light was illuminated. I flew the aircraft while the Captain called Maintenance and discussed the situation. We were quickly out of radio range and Captain initiated a phone patch with Maintenance Control. Reception was intermittent and the Captain elected to return to departure airport. We were deviating for weather and it took some time to turn around. We reviewed the QRH but no checklist was relevant. The landing was uneventful. The aircraft had a previous history of issues with auto-throttles and MCP.
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.