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A CE525 FMS failed while the single pilot was on a GPS approach so after descending 400 ft below the final approach fix altitude he disconnected the autopilot.
| Attributes | |
| ACN | 995092 |
| Time | |
| Date | 201202 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Citationjet (C525/C526) - CJ I / II / III / IV |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | Single Pilot |
| Qualification | Flight Crew Instrument Flight Crew Private Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 75 Flight Crew Total 7000 Flight Crew Type 500 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Published Material / Policy |
Narrative:
FMS failed on GPS approach. Aircraft descended 400 ft below final approach fix altitude on GPS runway xxr. Pilot corrected event manually by times disengaging autopilot.
Original NASA ASRS Text
Title: A CE525 FMS failed while the single pilot was on a GPS approach so after descending 400 FT below the final approach fix altitude he disconnected the autopilot.
Narrative: FMS failed on GPS approach. Aircraft descended 400 FT below final approach fix altitude on GPS Runway XXR. Pilot corrected event manually by times disengaging autopilot.
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.