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Crj captain reported experiencing faulty GPS signal to navigation displays. ATC was infomed and provided heading clearances.
| Attributes | |
| ACN | 1641227 |
| Time | |
| Date | 201904 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZDC.ARTCC |
| State Reference | VA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Regional Jet 700 ER/LR (CRJ700) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Component | |
| Aircraft Component | GPS & Other Satellite Navigation |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Clearance Deviation - Track / Heading All Types |
Narrative:
During cruise; we noticed that we were getting a message for FMS dr on mfd. We tried several times to reset position using other navigational means. We were queried by ATC if were we assigned a heading. We informed ATC that we were given direct to dunfe which was what our mfd was showing; however; our position was in accurate. We informed ATC that our GPS navigation was inoperable. ATC assigned heading vectors all the way to phl. As we prepared to intercept the localizer for [runway] 27R; we did not have the correct course set and had to get vectors back for a second approach. The mfd was providing erroneous position indicating due to the faulty GPS positioning. ATC first detected us off course. The mfd was showing our position with a 40 mile error. Faulty GPS locating caused us to be off of our intended course. Complied with ATC instructions and flew assigned headings.
Original NASA ASRS Text
Title: CRJ Captain reported experiencing faulty GPS signal to navigation displays. ATC was infomed and provided heading clearances.
Narrative: During cruise; we noticed that we were getting a message for FMS DR on MFD. We tried several times to reset position using other navigational means. We were queried by ATC if were we assigned a heading. We informed ATC that we were given direct to DUNFE which was what our MFD was showing; however; our position was in accurate. We informed ATC that our GPS navigation was inoperable. ATC assigned heading vectors all the way to PHL. As we prepared to intercept the LOC for [Runway] 27R; we did not have the correct course set and had to get vectors back for a second approach. The MFD was providing erroneous position indicating due to the faulty GPS positioning. ATC first detected us off course. The MFD was showing our position with a 40 mile error. Faulty GPS locating caused us to be off of our intended course. Complied with ATC instructions and flew assigned headings.
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.