 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Lear 45 on a maintenance test flight slowed to stick shaker speed in a hold on autopilot at FL410. Lost 5-700 feet of altitude in a manually flown recovery when the autopilot disconnected.
| Attributes | |
| ACN | 847507 |
| Time | |
| Date | 200908 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Learjet 45 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Route In Use | Direct |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Throttle/Power Level |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 30 Flight Crew Total 8500 Flight Crew Type 3000 |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor |
| Experience | Flight Crew Last 90 Days 100 Flight Crew Total 11600 Flight Crew Type 3000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Deviation - Speed All Types Inflight Event / Encounter Loss Of Aircraft Control |
Narrative:
On maintenance flight in a holding pattern with auto pilot engaged at holding speed; airspeed decreased to a point that activated the stick shaker resulting in an auto pilot disconnect which resulted in a loss of 500 ft in altitude. Immediately climbed back to assigned altitude.
Original NASA ASRS Text
Title: Lear 45 on a maintenance test flight slowed to stick shaker speed in a hold on autopilot at FL410. Lost 5-700 feet of altitude in a manually flown recovery when the autopilot disconnected.
Narrative: On maintenance flight in a holding pattern with auto pilot engaged at holding speed; airspeed decreased to a point that activated the stick shaker resulting in an auto pilot disconnect which resulted in a loss of 500 FT in altitude. Immediately climbed back to assigned altitude.
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.