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Flight crew responded to TCASII alert and received a second alert, after an 'all clear.' evasive action go around.
| Attributes | |
| ACN | 317708 |
| Time | |
| Date | 199510 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : cos |
| State Reference | CO |
| Altitude | msl bound lower : 1500 msl bound upper : 1500 |
| Aircraft 1 | |
| Controlling Facilities | tracon : cos |
| Operator | common carrier : air carrier |
| Make Model Name | Fokker 100 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach landing : go around |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 317708 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 100 |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
On final to cos at 1500 ft AGL, the TCASII suddenly alerted to a target approximately 100 ft below the aircraft. A climb was initiated with an all clear. Descent was continued and a second alert was received. A go around was initiated. ATC had no reported or observed traffic in the area.
Original NASA ASRS Text
Title: FLC RESPONDED TO TCASII ALERT AND RECEIVED A SECOND ALERT, AFTER AN 'ALL CLR.' EVASIVE ACTION GAR.
Narrative: ON FINAL TO COS AT 1500 FT AGL, THE TCASII SUDDENLY ALERTED TO A TARGET APPROX 100 FT BELOW THE ACFT. A CLB WAS INITIATED WITH AN ALL CLR. DSCNT WAS CONTINUED AND A SECOND ALERT WAS RECEIVED. A GAR WAS INITIATED. ATC HAD NO RPTED OR OBSERVED TFC IN THE AREA.
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.