 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Dash 8-200 flight crew reported an altitude overshoot resulted when the autopilot pitched up for unknown reasons.
| Attributes | |
| ACN | 1432823 |
| Time | |
| Date | 201703 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | PCT.TRACON |
| State Reference | VA |
| Aircraft 1 | |
| Make Model Name | Dash 8-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Autopilot |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Altitude Overshoot Deviation - Procedural Clearance |
Narrative:
All operations prior to climb were normal. ATC assigned an altitude of 11;000 feet. 11;000 feet was set in the altitude selector. The autopilot was engaged in the following modes: LNAV; altitude sel and in pitch (pitch attitude was set at 5 degrees nose up). These parameters were verified and confirmed. As the aircraft approached 11;000 feet the aircraft pitched up to more than 10 degrees nose high and did not capture the 11;000 foot assigned altitude. Both the first officer and myself noticed this happen at the same time and also noticed 8000 fpm where 'pitch' was indicated prior. I immediately disconnected the autopilot and began a descent back to 11;000 feet. The highest altitude we saw on the altimeter was 11;400 feet. I directed the first officer to contact ATC and inform them what happened. ATC acknowledged and proceeded as normal. We continued that flight and reengaged the autopilot with no other abnormal operations.
Original NASA ASRS Text
Title: Dash 8-200 flight crew reported an altitude overshoot resulted when the autopilot pitched up for unknown reasons.
Narrative: All operations prior to climb were normal. ATC assigned an altitude of 11;000 feet. 11;000 feet was set in the altitude selector. The autopilot was engaged in the following modes: LNAV; ALT SEL and in pitch (pitch attitude was set at 5 degrees nose up). These parameters were verified and confirmed. As the aircraft approached 11;000 feet the aircraft pitched up to more than 10 degrees nose high and did not capture the 11;000 foot assigned altitude. Both the FO and myself noticed this happen at the same time and also noticed 8000 fpm where 'pitch' was indicated prior. I immediately disconnected the autopilot and began a descent back to 11;000 feet. The highest altitude we saw on the altimeter was 11;400 feet. I directed the FO to contact ATC and inform them what happened. ATC acknowledged and proceeded as normal. We continued that flight and reengaged the autopilot with no other abnormal operations.
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.