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A learjet captain reported a failure of the yaw damper system while making a turn during the climb phase of flight. The airplane entered into a dutch roll which resulted in an overshoot of the assigned altitude. The dutch roll was successfully arrested and the aircraft was returned to the cleared altitude.
| Attributes | |
| ACN | 1336246 |
| Time | |
| Date | 201602 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Learjet 35 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Initial Climb |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Autoflight Yaw Damper |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 120 Flight Crew Total 2890 Flight Crew Type 800 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Altitude Excursion From Assigned Altitude Deviation - Altitude Overshoot Inflight Event / Encounter Loss Of Aircraft Control |
Narrative:
On departure [we were] given a right turn to the northwest while told to maintain 8;000 feet MSL. During the turn our yaw damper malfunctioned and the aircraft began to go into a 'dutch roll'. While bringing the aircraft out of the 'dutch roll'; we were unable to level off at 8;000 feet MSL and reached an altitude of 8;400 feet MSL. Once we had taken the aircraft out of the 'dutch roll'; we went back down to 8;000 feet MSL and informed ATC of our situation. We landed without incident and were not asked to contact anyone or given a phone number.
Original NASA ASRS Text
Title: A Learjet Captain reported a failure of the yaw damper system while making a turn during the climb phase of flight. The airplane entered into a Dutch roll which resulted in an overshoot of the assigned altitude. The Dutch roll was successfully arrested and the aircraft was returned to the cleared altitude.
Narrative: On departure [we were] given a right turn to the northwest while told to maintain 8;000 feet MSL. During the turn our yaw damper malfunctioned and the aircraft began to go into a 'Dutch roll'. While bringing the aircraft out of the 'Dutch roll'; we were unable to level off at 8;000 feet MSL and reached an altitude of 8;400 feet MSL. Once we had taken the aircraft out of the 'Dutch roll'; we went back down to 8;000 feet MSL and informed ATC of our situation. We landed without incident and were not asked to contact anyone or given a phone number.
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.