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A pilot reported they temporarily lost the GPS signal.
| Attributes | |
| ACN | 1690252 |
| Time | |
| Date | 201910 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZOB.ARTCC |
| State Reference | OH |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Citationjet (C525/C526) - CJ I / II / III / IV |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | GPS & Other Satellite Navigation |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Instrument Flight Crew Multiengine |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Altitude Undershoot Deviation - Procedural Clearance |
Narrative:
Routine return flight. Everything was normal up until our climb from 28;500 thru 29;000 feet when suddenly the autopilot annunciation sounded and then followed by a complete GPS failure. We let ATC know the issues we were dealing with and they gave us a heading and an altitude. I was currently the pilot flying and given 27;000 feet. On our descent back down to 27;000 feet; we were working hard to get the avionics issue figured out and I believe there was a miscommunication between the pilot flying and pilot monitoring regarding our selected altitude. Workload was at its peak and we leveled off at 28;000 feet momentarily. While hand flying; we determined flight guidance system 1 and 2 had failed. ATC gave us off route vectors and were very understanding of our situation and very patient with us. It was about 30 seconds between our brief level off at 28;000 feet when ATC politely asked us to descend to 27;000 feet when workload permitted. We made our descent to 27;000 feet and after about a total of 5 minutes; we regained GPS signal and flight guidance system began working as normal. Crew coordination and verifying altitudes during an abnormal operations like we experienced should have remained an essential item to cross check and confirm.
Original NASA ASRS Text
Title: A pilot reported they temporarily lost the GPS signal.
Narrative: Routine return flight. Everything was normal up until our climb from 28;500 thru 29;000 feet when suddenly the autopilot annunciation sounded and then followed by a complete GPS failure. We let ATC know the issues we were dealing with and they gave us a heading and an altitude. I was currently the Pilot Flying and given 27;000 feet. On our descent back down to 27;000 feet; we were working hard to get the avionics issue figured out and I believe there was a miscommunication between the Pilot Flying and Pilot Monitoring regarding our selected altitude. Workload was at its peak and we leveled off at 28;000 feet momentarily. While hand flying; we determined flight guidance system 1 and 2 had failed. ATC gave us off route vectors and were very understanding of our situation and very patient with us. It was about 30 seconds between our brief level off at 28;000 feet when ATC politely asked us to descend to 27;000 feet when workload permitted. We made our descent to 27;000 feet and after about a total of 5 minutes; we regained GPS signal and Flight Guidance system began working as normal. Crew coordination and verifying altitudes during an abnormal operations like we experienced should have remained an essential item to cross check and confirm.
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.