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Air carrier aircraft being vectored by separate final controllers had less than standard separation during turn onto localizer.
| Attributes | |
| ACN | 97394 |
| Time | |
| Date | 198811 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : ind |
| State Reference | IN |
| Altitude | msl bound lower : 2600 msl bound upper : 3100 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : ind |
| 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 |
| 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 | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| ASRS Report | 97394 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Miss Distance | horizontal : 7500 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Medium large transport X had to be pulled off localizer due to traffic ahead. Had already flown over 75 mi in my airspace. Controller on other side of localizer was busy. I turned the medium large transport X toward a gap, trying to get other controller to slow aircraft behind, and/or stop descent. No response. Finally instructed other controller to turn his aircraft, medium large transport Y, off localizer. Aircraft turned slower than expected. Finished working in traffic, then reported incident to supervisor. 2 aircraft came within 1 1/4 mi and 500'.
Original NASA ASRS Text
Title: ACR ACFT BEING VECTORED BY SEPARATE FINAL CTLRS HAD LESS THAN STANDARD SEPARATION DURING TURN ONTO LOCALIZER.
Narrative: MLG X HAD TO BE PULLED OFF LOC DUE TO TFC AHEAD. HAD ALREADY FLOWN OVER 75 MI IN MY AIRSPACE. CTLR ON OTHER SIDE OF LOC WAS BUSY. I TURNED THE MLG X TOWARD A GAP, TRYING TO GET OTHER CTLR TO SLOW ACFT BEHIND, AND/OR STOP DSCNT. NO RESPONSE. FINALLY INSTRUCTED OTHER CTLR TO TURN HIS ACFT, MLG Y, OFF LOC. ACFT TURNED SLOWER THAN EXPECTED. FINISHED WORKING IN TFC, THEN REPORTED INCIDENT TO SUPVR. 2 ACFT CAME WITHIN 1 1/4 MI AND 500'.
Data retrieved from NASA's ASRS site as of August 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.