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B777 flight crew reported they returned to departure airport after experiencing compressor stalls on the left engine.
| Attributes | |
| ACN | 1327858 |
| Time | |
| Date | 201601 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Turbine Engine |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 100 Flight Crew Total 21000 Flight Crew Type 2000 |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Normal departure; level at FL310 began to experience surge and stalls on the left engine. Performed engine surge checklist and reduced power at which time the problem stopped. Started the drift down checklist and had the relief pilots return to the cockpit and alerted the cabin crew of the problem. At this point considered a diversion airport and chose [departure airport]. Received a direct routing from ATC. Contacted dispatch and maintenance. All in agreement to return [to departure airport]. Fuel dump was initiated and [ATC was advised]. Jettisoned approximately 130;000 pounds to land below max structural. Return to [departure airport]; approach and flap 20 landing were uneventful. Taxied under own power to gate. Completed parking checklist. Checked on cabin situation and no problems reported. Was debriefed by captain to his satisfaction. Contacted duty manager to provide any additional information required.
Original NASA ASRS Text
Title: B777 flight crew reported they returned to departure airport after experiencing compressor stalls on the left engine.
Narrative: Normal departure; level at FL310 began to experience surge and stalls on the left engine. Performed engine surge checklist and reduced power at which time the problem stopped. Started the drift down checklist and had the relief pilots return to the cockpit and alerted the cabin crew of the problem. At this point considered a diversion airport and chose [departure airport]. Received a direct routing from ATC. Contacted Dispatch and Maintenance. All in agreement to return [to departure airport]. Fuel dump was initiated and [ATC was advised]. Jettisoned approximately 130;000 LBS to land below max structural. Return to [departure airport]; approach and flap 20 landing were uneventful. Taxied under own power to gate. Completed parking checklist. Checked on cabin situation and no problems reported. Was debriefed by Captain to his satisfaction. Contacted Duty Manager to provide any additional information required.
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.