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An lj-31 captain disconnected the autopilot and recovered to their cleared altitude following a hardover input during level off.
| Attributes | |
| ACN | 943883 |
| Time | |
| Date | 201104 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZDC.ARTCC |
| State Reference | VA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Learjet 31 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Descent |
| Route In Use | Direct |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Autopilot |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Engineer |
| Experience | Flight Crew Last 90 Days 200 Flight Crew Total 27000 Flight Crew Type 4500 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Altitude Excursion From Assigned Altitude Deviation - Altitude Overshoot |
Narrative:
[We] were given an enroute descent to cross dilnn at FL330. As we started to have automatic level off by autopilot; the autopilot did a 'hard over' and we descended another 700 ft at 2;000 plus FPM. Autopilot was uncoupled and immediate climb restored aircraft to FL330. No other planes were near-by. TCAS was not activated.
Original NASA ASRS Text
Title: An LJ-31 Captain disconnected the autopilot and recovered to their cleared altitude following a hardover input during level off.
Narrative: [We] were given an enroute descent to cross DILNN at FL330. As we started to have automatic level off by autopilot; the autopilot did a 'hard over' and we descended another 700 FT at 2;000 plus FPM. Autopilot was uncoupled and immediate climb restored aircraft to FL330. No other planes were near-by. TCAS was NOT activated.
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.