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TRACON intrafac coordination visual approach to same runway air carrier X had less than standard separation from air carrier Y. System error.
| Attributes | |
| ACN | 241520 |
| Time | |
| Date | 199305 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 3000 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dfw |
| 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 | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller military : 4 controller non radar : 2 controller radar : 19 |
| ASRS Report | 241520 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Inter Facility Coordination Failure |
Narrative:
I was working arrival radar 2 (AR2). Air carrier X was on downwind expecting a visual approach to runway 18R. Arrival radar 1 was bringing air carrier Y to runway 18R. He said he would follow air carrier X. I started a turn to 110 toward the airport. I changed the sequence, thinking it would work better if I followed the air carrier Y. I stopped air carrier X turn at 360 degrees which was blocked. (I found out later by reviewing the tape.) I turned air carrier X to 020. This was not acknowledged. Traffic was issued. I finally turned air carrier X to a 350 degree heading. He finally saw the traffic but separation was lost. Closer attention on my part for the readback would have prevented this occurrence. Also, I should have stuck with the original plan. AR1 had more airplanes than I did -- I was trying to make it as easy as I could for him.
Original NASA ASRS Text
Title: TRACON INTRAFAC COORD VISUAL APCH TO SAME RWY ACR X HAD LTSS FROM ACR Y. SYS ERROR.
Narrative: I WAS WORKING ARR RADAR 2 (AR2). ACR X WAS ON DOWNWIND EXPECTING A VISUAL APCH TO RWY 18R. ARR RADAR 1 WAS BRINGING ACR Y TO RWY 18R. HE SAID HE WOULD FOLLOW ACR X. I STARTED A TURN TO 110 TOWARD THE ARPT. I CHANGED THE SEQUENCE, THINKING IT WOULD WORK BETTER IF I FOLLOWED THE ACR Y. I STOPPED ACR X TURN AT 360 DEGS WHICH WAS BLOCKED. (I FOUND OUT LATER BY REVIEWING THE TAPE.) I TURNED ACR X TO 020. THIS WAS NOT ACKNOWLEDGED. TFC WAS ISSUED. I FINALLY TURNED ACR X TO A 350 DEG HDG. HE FINALLY SAW THE TFC BUT SEPARATION WAS LOST. CLOSER ATTN ON MY PART FOR THE READBACK WOULD HAVE PREVENTED THIS OCCURRENCE. ALSO, I SHOULD HAVE STUCK WITH THE ORIGINAL PLAN. AR1 HAD MORE AIRPLANES THAN I DID -- I WAS TRYING TO MAKE IT AS EASY AS I COULD FOR HIM.
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.