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A g-iv electric pitch trim failed while climbing into rvsm airspace which caused an altitude overshoot at FL283 so rvsm was canceled and the flight continued at FL280.
| Attributes | |
| ACN | 1015988 |
| Time | |
| Date | 201206 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZZ.ARTCC |
| State Reference | FO |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Gulfstream IV / G350 / G450 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Climb |
| Route In Use | Direct |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Horizontal Stabilizer Trim Motor |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Flight Engineer Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 40 Flight Crew Total 5600 Flight Crew Type 850 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Altitude Overshoot |
Narrative:
During climb with the autopilot engaged; the aircraft attempted to level off at assigned altitude of FL280. The aircraft began to porpoise and the electric pitch trim failed. The autopilot disconnected and the aircraft climbed to 28;300 ft. Evasive action was immediately taken to correct the altitude deviation by hand flying the aircraft. The electric pitch trim was reset and autopilot was re-engaged. We were then given a higher altitude assigned and began to climb to it when the electric trim failed again and the autopilot disconnected. We informed ATC that we were no longer rvsm equipped due to equipment failure. We requested descent to FL280 to leave rvsm airspace and continued the flight at that altitude until descent.
Original NASA ASRS Text
Title: A G-IV electric pitch trim failed while climbing into RVSM airspace which caused an altitude overshoot at FL283 so RVSM was canceled and the flight continued at FL280.
Narrative: During climb with the autopilot engaged; the aircraft attempted to level off at assigned altitude of FL280. The aircraft began to porpoise and the electric pitch trim failed. The autopilot disconnected and the aircraft climbed to 28;300 FT. Evasive action was immediately taken to correct the altitude deviation by hand flying the aircraft. The electric pitch trim was reset and autopilot was re-engaged. We were then given a higher altitude assigned and began to climb to it when the electric trim failed again and the autopilot disconnected. We informed ATC that we were no longer RVSM equipped due to equipment failure. We requested descent to FL280 to leave RVSM airspace and continued the flight at that altitude until descent.
Data retrieved from NASA's ASRS site as of July 2013 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.