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Less than standard separation occurred between 2 aircraft being vectored to final approach course. TCASII alarm interferes with controller's instructions to turn.
| Attributes | |
| ACN | 321693 |
| Time | |
| Date | 199511 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : mia |
| State Reference | FL |
| Altitude | msl bound lower : 1500 msl bound upper : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : mia |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 8000 flight time type : 1500 |
| ASRS Report | 321693 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure other anomaly other other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Miss Distance | horizontal : 500 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
We were on radar vector with mia approach. Our heading was 360 degrees, and we were within 2 mi of the final course for runway 9R. We observed on TCASII an aircraft approaching head-on, 500 ft below us. The TCASII initially went into TA mode, then an RA mode of climb. At that point we saw the target, a DC9, on a south heading about 500 ft below us, off to our left. Due to the volume of the RA we were unable to hear mia approach issue a heading, and approach clearance to runway 9R.
Original NASA ASRS Text
Title: LTSS OCCURRED BTWN 2 ACFT BEING VECTORED TO FINAL APCH COURSE. TCASII ALARM INTERFERES WITH CTLR'S INSTRUCTIONS TO TURN.
Narrative: WE WERE ON RADAR VECTOR WITH MIA APCH. OUR HDG WAS 360 DEGS, AND WE WERE WITHIN 2 MI OF THE FINAL COURSE FOR RWY 9R. WE OBSERVED ON TCASII AN ACFT APCHING HEAD-ON, 500 FT BELOW US. THE TCASII INITIALLY WENT INTO TA MODE, THEN AN RA MODE OF CLB. AT THAT POINT WE SAW THE TARGET, A DC9, ON A S HDG ABOUT 500 FT BELOW US, OFF TO OUR L. DUE TO THE VOLUME OF THE RA WE WERE UNABLE TO HEAR MIA APCH ISSUE A HDG, AND APCH CLRNC TO RWY 9R.
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.