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D10 controller recognizes conflicting event between SF34, under his control, and an MD80 tracking through the adjoining final approach course on another D10 controller's frequency.
| Attributes | |
| ACN | 460870 |
| Time | |
| Date | 199912 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : ttt.vor |
| State Reference | TX |
| Altitude | msl bound lower : 5000 msl bound upper : 5700 |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | other |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340B |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 31r |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : d10.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 12 controller time certified in position1 : 4.5 |
| ASRS Report | 460870 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne critical non adherence : required legal separation non adherence : published procedure non adherence : clearance other spatial deviation |
| Independent Detector | atc equipment : conflict alert other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 3000 vertical : 0 |
| Supplementary | |
| Problem Areas | Airspace Structure Flight Crew Human Performance ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Intra Facility Coordination Failure Operational Error |
Narrative:
I was working a feeder/arrival position. Air carrier X was established on the runway 31R final at 5000 ft. I noticed an aircraft (air carrier Y) descending through 5700 ft and converging. I issued traffic as conflict alert activated. The SF34 saw the MD80 off his left at less than 1 mi and descending. I instructed him to maintain visual and he elected to climb to avoid. I believe the MD80 did not follow control instructions which caused the near midair collision. Also, conflict alert may not have activated quickly enough. A situation on AR1 position may have distraction the controller in charge of air carrier Y causing him to miss the fact that air carrier Y had not taken the turn. Neither pilot apparently had TCASII alerts. Air carrier X did not mention TCASII or RA.
Original NASA ASRS Text
Title: D10 CTLR RECOGNIZES CONFLICTING EVENT BTWN SF34, UNDER HIS CTL, AND AN MD80 TRACKING THROUGH THE ADJOINING FINAL APCH COURSE ON ANOTHER D10 CTLR'S FREQ.
Narrative: I WAS WORKING A FEEDER/ARR POS. ACR X WAS ESTABLISHED ON THE RWY 31R FINAL AT 5000 FT. I NOTICED AN ACFT (ACR Y) DSNDING THROUGH 5700 FT AND CONVERGING. I ISSUED TFC AS CONFLICT ALERT ACTIVATED. THE SF34 SAW THE MD80 OFF HIS L AT LESS THAN 1 MI AND DSNDING. I INSTRUCTED HIM TO MAINTAIN VISUAL AND HE ELECTED TO CLB TO AVOID. I BELIEVE THE MD80 DID NOT FOLLOW CTL INSTRUCTIONS WHICH CAUSED THE NMAC. ALSO, CONFLICT ALERT MAY NOT HAVE ACTIVATED QUICKLY ENOUGH. A SIT ON AR1 POS MAY HAVE DISTR THE CTLR IN CHARGE OF ACR Y CAUSING HIM TO MISS THE FACT THAT ACR Y HAD NOT TAKEN THE TURN. NEITHER PLT APPARENTLY HAD TCASII ALERTS. ACR X DID NOT MENTION TCASII OR RA.
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.