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B747 captain reported receiving a flaps primary EICAS; speed low and le flaps message requiring full thrust to stabilize the aircraft. Crew dumped fuel and safely diverted.
| Attributes | |
| ACN | 1389708 |
| Time | |
| Date | 201609 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Flap Control (Trailing & Leading Edge) |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Total 7722 Flight Crew Type 4330 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
The autopilot was on climbing thru 30;000 ft. We received an EICAS message flaps primary; followed by speed low. Speed tape was indicating red and yellow with no safety margins. Flaps secondary operations was also indicated showing right mid. Le flaps extension causing the airplane to roll to the right.it took full trust and a few minutes to stabilize the aircraft. Dispatch and [maintenance control] were contacted. After extensive discussions and concurrence from dispatch and [maintenance control]; I made the decision to divert. We dumped 50;000 lbs of fuel to land at 629;000 lbs.
Original NASA ASRS Text
Title: B747 Captain reported receiving a FLAPS PRIMARY EICAS; SPEED LOW and LE FLAPS message requiring full thrust to stabilize the aircraft. Crew dumped fuel and safely diverted.
Narrative: The autopilot was on climbing thru 30;000 ft. We received an EICAS message FLAPS PRIMARY; followed by SPEED LOW. Speed Tape was indicating red and yellow with no safety margins. Flaps secondary operations was also indicated showing right mid. LE FLAPS extension causing the airplane to roll to the right.It took full trust and a few minutes to stabilize the aircraft. Dispatch and [maintenance control] were contacted. After extensive discussions and concurrence from Dispatch and [maintenance control]; I made the decision to divert. We dumped 50;000 lbs of fuel to land at 629;000 lbs.
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.