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A B757-200 flight crew on a transatlantic flight lost autoflight and autothrottle capability shortly after takeoff. They completed the flight operating all flight path functions manually.
| Attributes | |
| ACN | 841566 |
| Time | |
| Date | 200906 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZZ.Airport |
| State Reference | FO |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Autoflight System |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Person 2 | |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Track / Heading All Types |
Narrative:
At 1600 ft with LNAV; climb thrust and VNAV selected; the autopilot was commanded on. Simultaneously; the tat probe warning appeared on the EICAS; followed by the a/T disconnect EICAS and aural warning. The autopilot also simultaneously dropped out of VNAV and LNAV modes and maintained current track. The autopilot was disconnected and the remainder of the departure was hand flown with reduced speed; and without thrust setting; VNAV; and LNAV guidance. The remainder of the flight was conducted with no VNAV; LNAV; or autothrottle as per dispatcher approval via HF phone patch prior to entering the nats segment of the flight.
Original NASA ASRS Text
Title: A B757-200 flight crew on a transatlantic flight lost autoflight and autothrottle capability shortly after takeoff. They completed the flight operating all flight path functions manually.
Narrative: At 1600 FT with LNAV; CLIMB THRUST and VNAV selected; the autopilot was commanded ON. Simultaneously; the TAT PROBE warning appeared on the EICAS; followed by the A/T DISCONNECT EICAS and aural warning. The autopilot also simultaneously dropped out of VNAV and LNAV modes and maintained current track. The autopilot was disconnected and the remainder of the departure was hand flown with reduced speed; and without thrust setting; VNAV; and LNAV guidance. The remainder of the flight was conducted with no VNAV; LNAV; or autothrottle as per Dispatcher approval via HF phone patch prior to entering the NATS segment of the flight.
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.