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B777 flight crew reported left engine N1 overspeed and egt overtemp after takeoff that resulted in a return to the departure airport.
| Attributes | |
| ACN | 1457262 |
| Time | |
| Date | 201706 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | LAS.Airport |
| State Reference | NV |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb Initial Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Turbine Engine |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 30 Flight Crew Total 22000 Flight Crew Type 150 |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 100 Flight Crew Total 15000 Flight Crew Type 1200 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
After takeoff; during climb at about 600 ft; noticed left engine overheat and overspeed. Retarded throttle and continued climb. Also got a 'thrust asym prot' EICAS message. [Advised ATC] initially and performed both checklists. Contacted dispatch; maintenance control and the duty officer. After discussions with all; initially according to our checklist and the duty officer; we could have continued the flight since engine was now running normally. However; after maintenance control recovered engine overheat and overspeed parameters; it was decided to return to the departure airport. Dispatch recommended returning because we had burned fuel and there were very few options on our route to go for refueling. Our primary concern was engine condition. We climbed to FL240; jettisoned fuel for landing. We returned to the departure airport for a normal two engine landing.
Original NASA ASRS Text
Title: B777 flight crew reported left engine N1 overspeed and EGT overtemp after takeoff that resulted in a return to the departure airport.
Narrative: After takeoff; during climb at about 600 FT; noticed left engine overheat and overspeed. Retarded throttle and continued climb. Also got a 'Thrust Asym Prot' EICAS message. [Advised ATC] initially and performed both checklists. Contacted Dispatch; Maintenance Control and the Duty Officer. After discussions with all; initially according to our checklist and the Duty Officer; we could have continued the flight since engine was now running normally. However; after Maintenance Control recovered engine overheat and overspeed parameters; it was decided to return to the departure airport. Dispatch recommended returning because we had burned fuel and there were very few options on our route to go for refueling. Our primary concern was engine condition. We climbed to FL240; jettisoned fuel for landing. We returned to the departure airport for a normal two engine landing.
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.