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Air carrier X TCASII RA had less than standard separation from air carrier Y evasive action taken. System error.
| Attributes | |
| ACN | 246462 |
| Time | |
| Date | 199307 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : clt |
| State Reference | NC |
| Altitude | msl bound lower : 7000 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : clt |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 12 |
| ASRS Report | 246462 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 12000 flight time type : 110 |
| ASRS Report | 247019 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 7920 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I vectored air carrier X across the final for runway 23 for spacing. I turned air carrier X back on to the final from the east. Air carrier Y on left downwind to runway 23 descending to 6000 ft, was issued 7000 as an amended altitude. Separation between air carrier X and air carrier Y was lost prior to course divergence. Supplemental information from acn 247019: air carrier X vectored to downwind runway 23 clt with clt approach. Descending through 7000 cleared to 6000. TCASII RA 'climb.' initiated climb through 7000 ft advised ATC of altitude deviation due to TCASII. Call to clt ATC area supervisor indicated ATC controller error. Widebody transport on straight-in runway 23 s- turning final passed within 100 ft.
Original NASA ASRS Text
Title: ACR X TCASII RA HAD LTSS FROM ACR Y EVASIVE ACTION TAKEN. SYS ERROR.
Narrative: I VECTORED ACR X ACROSS THE FINAL FOR RWY 23 FOR SPACING. I TURNED ACR X BACK ON TO THE FINAL FROM THE E. ACR Y ON L DOWNWIND TO RWY 23 DSNDING TO 6000 FT, WAS ISSUED 7000 AS AN AMENDED ALT. SEPARATION BTWN ACR X AND ACR Y WAS LOST PRIOR TO COURSE DIVERGENCE. SUPPLEMENTAL INFO FROM ACN 247019: ACR X VECTORED TO DOWNWIND RWY 23 CLT WITH CLT APCH. DSNDING THROUGH 7000 CLRED TO 6000. TCASII RA 'CLB.' INITIATED CLB THROUGH 7000 FT ADVISED ATC OF ALTDEV DUE TO TCASII. CALL TO CLT ATC AREA SUPVR INDICATED ATC CTLR ERROR. WDB ON STRAIGHT-IN RWY 23 S- TURNING FINAL PASSED WITHIN 100 FT.
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.