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Captain reported a malfunction of the autopilot during climb out which resulted in a flap over speed.
| Attributes | |
| ACN | 1417982 |
| Time | |
| Date | 201701 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Autoflight System |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Speed All Types |
Narrative:
During initial climb in VNAV; shortly after right autopilot engagement by the flying pilot and during the flaps transition from 5; 1 to up; the autopilot commanded the aircraft to descend. While the airspeed was increasing; as the monitoring pilot I took command of the aircraft by disengaging the autopilot and flying manually back to a climb. During the few seconds of recovery; the maximum flap speed may have been exceeded. The autopilot was later reengaged without a problem. A maintenance write up of the event was send via ACARS to the maintenance department.
Original NASA ASRS Text
Title: Captain reported a malfunction of the autopilot during climb out which resulted in a flap over speed.
Narrative: During initial climb in VNAV; shortly after right autopilot engagement by the flying pilot and during the flaps transition from 5; 1 to up; the autopilot commanded the aircraft to descend. While the airspeed was increasing; as the monitoring pilot I took command of the aircraft by disengaging the autopilot and flying manually back to a climb. During the few seconds of recovery; the maximum flap speed may have been exceeded. The autopilot was later reengaged without a problem. A maintenance write up of the event was send via ACARS to the maintenance department.
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.