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B737-700 flight crew experiences an autothrust anomaly during go-around that causes an inappropriate maximum thrust setting with resulting pitch up and low airspeed with stick shaker.
| Attributes | |
| ACN | 1061011 |
| Time | |
| Date | 201301 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Component | |
| Aircraft Component | Autothrottle/Speed Control |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Experience | Flight Crew Last 90 Days 324 |
| Person 2 | |
| Function | Pilot Flying Captain |
| Experience | Flight Crew Last 90 Days 161 Flight Crew Type 7500 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Speed All Types Inflight Event / Encounter Loss Of Aircraft Control |
Narrative:
On go-around; the pilot flying selected the go-around button once with the autothrottles engaged. The autothrottles commanded full thrust and the pilot flying wasn't ready for the uncommanded thrust setting. This caused a big pitch increase and subsequent stick shaker. We landed on the next approach and wrote up the autothrottle system. The mechanic found a fault in the system and put the autothrottle on MEL.
Original NASA ASRS Text
Title: B737-700 flight crew experiences an autothrust anomaly during go-around that causes an inappropriate maximum thrust setting with resulting pitch up and low airspeed with stick shaker.
Narrative: On go-around; the Pilot Flying selected the go-around button once with the autothrottles engaged. The autothrottles commanded full thrust and the Pilot Flying wasn't ready for the uncommanded thrust setting. This caused a big pitch increase and subsequent stick shaker. We landed on the next approach and wrote up the autothrottle system. The Mechanic found a fault in the system and put the autothrottle on MEL.
Data retrieved from NASA's ASRS site as of July 2013 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.