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A BE36 pilot reported that since upgrading his garmin GNS530 to the GNS530W (waas) he has experienced temporary loss of signal causing the unit to flash 'dead reconing.'
| Attributes | |
| ACN | 970129 |
| Time | |
| Date | 201109 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | GSP.Airport |
| State Reference | SC |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Bonanza 36 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Final Approach |
| Route In Use | Direct |
| Flight Plan | IFR |
| Person 1 | |
| Function | Single Pilot Pilot Flying |
| Qualification | Flight Crew Private Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 20 Flight Crew Total 1180 Flight Crew Type 500 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Since upgrading my garmin GPS/nav/com from the GNS530 to the GNS530W [waas] I have had temporary loss of GPS signal causing the unit to flash 'dead reckoning.' most recently; on approach to gsp (fortunately in VMC at the time and tracking the localizer to runway 04 via CDI); the GNS530W lost signal and went into 'dead reckoning.' had I been IMC on a GPS approach I would have lost all guidance including my missed approach guidance. I did contact the shop which has installed the unit for garmin. He is planning to contact garmin; but he advised me in an email that he has about ten customers all of whom have the same problem. Doing an internet search; I have found blogs from people experiencing the same issue with the GNS530W.
Original NASA ASRS Text
Title: A BE36 pilot reported that since upgrading his Garmin GNS530 to the GNS530W (WAAS) he has experienced temporary loss of signal causing the unit to flash 'dead reconing.'
Narrative: Since upgrading my Garmin GPS/Nav/Com from the GNS530 to the GNS530W [WAAS] I have had temporary loss of GPS signal causing the unit to flash 'DEAD RECKONING.' Most recently; on approach to GSP (fortunately in VMC at the time and tracking the localizer to Runway 04 via CDI); the GNS530W lost signal and went into 'DEAD RECKONING.' Had I been IMC on a GPS approach I would have lost all guidance including my missed approach guidance. I did contact the shop which has installed the unit for Garmin. He is planning to contact Garmin; but he advised me in an email that he has about ten customers all of whom have the same problem. Doing an internet search; I have found blogs from people experiencing the same issue with the GNS530W.
Data retrieved from NASA's ASRS site as of April 2012 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.