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Pilot of a C210 found that his aircraft's GPS would not initiate a navigation reference point during taxi out or until 44 mi out at 7500 ft MSL where it began receiving more than 2 satellites. He had heard that other pilots had experienced the same problem in the same area.
| Attributes | |
| ACN | 435119 |
| Time | |
| Date | 199904 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : hpn.airport |
| State Reference | NY |
| Altitude | agl bound lower : 0 agl bound upper : 7500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Cessna 210 Centurion / Turbo Centurion 210C, 210D |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Phase | climbout : intermediate altitude cruise : level ground : taxi |
| Flight Plan | None |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 75 flight time total : 1825 flight time type : 415 |
| ASRS Report | 435119 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | aircraft equipment other aircraft equipment : gps other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Supplementary | |
| Problem Areas | Aircraft Navigational Facility |
| Primary Problem | Aircraft |
Narrative:
On taxi for departure from hpn, my kln-90B GPS failed to initialize. Cavu conditions prevailed, so I departed for ack. In the climb to 7500 ft, only 1 or 2 satellites were being received. Doublechking with a handheld garmin 90, it too failed to initialize. Only 1 satellite was received and only 2-3 satellites were shown on the initialization page. On rebooting both units over hpn, they acquired navigation signals normally. Other pilots I spoke with upon landing indicated that they too had difficulties acquiring usable GPS signals in the vicinity of hpn.
Original NASA ASRS Text
Title: PLT OF A C210 FOUND THAT HIS ACFT'S GPS WOULD NOT INITIATE A NAV REF POINT DURING TAXI OUT OR UNTIL 44 MI OUT AT 7500 FT MSL WHERE IT BEGAN RECEIVING MORE THAN 2 SATELLITES. HE HAD HEARD THAT OTHER PLTS HAD EXPERIENCED THE SAME PROB IN THE SAME AREA.
Narrative: ON TAXI FOR DEP FROM HPN, MY KLN-90B GPS FAILED TO INITIALIZE. CAVU CONDITIONS PREVAILED, SO I DEPARTED FOR ACK. IN THE CLB TO 7500 FT, ONLY 1 OR 2 SATELLITES WERE BEING RECEIVED. DOUBLECHKING WITH A HANDHELD GARMIN 90, IT TOO FAILED TO INITIALIZE. ONLY 1 SATELLITE WAS RECEIVED AND ONLY 2-3 SATELLITES WERE SHOWN ON THE INITIALIZATION PAGE. ON REBOOTING BOTH UNITS OVER HPN, THEY ACQUIRED NAV SIGNALS NORMALLY. OTHER PLTS I SPOKE WITH UPON LNDG INDICATED THAT THEY TOO HAD DIFFICULTIES ACQUIRING USABLE GPS SIGNALS IN THE VICINITY OF HPN.
Data retrieved from NASA's ASRS site as of July 2007 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.