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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Twin jet pilot reported GPS abnormalities two days in a row.
| Attributes | |
| ACN | 1654079 |
| Time | |
| Date | 201906 |
| Aircraft 1 | |
| Make Model Name | EMB-505 / Phenom 300 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | GPS & Other Satellite Navigation |
| Person 1 | |
| Function | First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
Descending through 37;000 feet; we had the autopilot and yaw damp disengage. Yesterday; we also had the very same issue occur on this aircraft. In both instances we were cruising at 43;000 feet; with the exception today. We were in the descent; just out of 37;000 feet from 43;000 feet. In both instances; we were outside the GPS testing range; with no GPS abnormalities. About two hours into both of the flights; the autopilot and yaw damp disengage; and then; about two to three minutes later; we have an automatic switch to ahrs 2. After running the appropriate checklists; we elected to divert. No further issues occurred.
Original NASA ASRS Text
Title: Twin jet pilot reported GPS abnormalities two days in a row.
Narrative: Descending through 37;000 feet; we had the autopilot and yaw damp disengage. Yesterday; we also had the very same issue occur on this aircraft. In both instances we were cruising at 43;000 feet; with the exception today. We were in the descent; just out of 37;000 feet from 43;000 feet. In both instances; we were outside the GPS testing range; with no GPS abnormalities. About two hours into both of the flights; the autopilot and yaw damp disengage; and then; about two to three minutes later; we have an automatic switch to AHRS 2. After running the appropriate checklists; we elected to divert. No further issues occurred.
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.