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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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GLF5 responded to TCAS RA on intermittent target at 6000 entering holding at bdr VOR; ATC advised no traffic in area.
| Attributes | |
| ACN | 749852 |
| Time | |
| Date | 200708 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : bdr.airport |
| State Reference | CT |
| Altitude | msl single value : 6000 |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90.tracon tower : mzbz.tower |
| Operator | general aviation : corporate |
| Make Model Name | Gulfstream V |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other other vortac |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : multi engine pilot : cfi |
| Experience | flight time last 90 days : 100 flight time total : 4950 flight time type : 440 |
| ASRS Report | 749852 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
We were entering a hold at the bridgeport VOR when we received a descend command from our TCAS. The display showed traffic ahead of us 400 ft above our altitude. The PF descended the plane in as commanded by the TCAS. According to the controller the only traffic in that area was well below our altitude; not above. While holding at the VOR this mysterious target appeared and disappeared several times; on each occasion the controller said there was no traffic in the area we described; at the VOR several hundred ft above us. The controller said the traffic in the area was several thousand ft below us. The plane has been checked out but no anomalies have been found nor has the plane issued RA's in error.
Original NASA ASRS Text
Title: GLF5 RESPONDED TO TCAS RA ON INTERMITTENT TARGET AT 6000 ENTERING HOLDING AT BDR VOR; ATC ADVISED NO TFC IN AREA.
Narrative: WE WERE ENTERING A HOLD AT THE BRIDGEPORT VOR WHEN WE RECEIVED A DSND COMMAND FROM OUR TCAS. THE DISPLAY SHOWED TFC AHEAD OF US 400 FT ABOVE OUR ALT. THE PF DSNDED THE PLANE IN AS COMMANDED BY THE TCAS. ACCORDING TO THE CTLR THE ONLY TFC IN THAT AREA WAS WELL BELOW OUR ALT; NOT ABOVE. WHILE HOLDING AT THE VOR THIS MYSTERIOUS TARGET APPEARED AND DISAPPEARED SEVERAL TIMES; ON EACH OCCASION THE CTLR SAID THERE WAS NO TFC IN THE AREA WE DESCRIBED; AT THE VOR SEVERAL HUNDRED FT ABOVE US. THE CTLR SAID THE TFC IN THE AREA WAS SEVERAL THOUSAND FT BELOW US. THE PLANE HAS BEEN CHKED OUT BUT NO ANOMALIES HAVE BEEN FOUND NOR HAS THE PLANE ISSUED RA'S IN ERROR.
Data retrieved from NASA's ASRS site as of January 2009 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.