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2 air carrier flts are given turns and amended altitude assignments when ZID controller realizes that there is a traffic conflict. System error occurred.
| Attributes | |
| ACN | 437036 |
| Time | |
| Date | 199905 |
| Day | Tue |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | navaid : ape.vortac |
| State Reference | OH |
| Altitude | msl single value : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : flight engineer pilot : atp pilot : multi engine |
| Experience | flight time last 90 days : 180 flight time total : 9500 flight time type : 825 |
| ASRS Report | 437036 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Events | |
| Anomaly | conflict : airborne critical non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance controller : separated traffic |
| Consequence | faa : reviewed incident with flight crew faa : investigated |
| Miss Distance | horizontal : 12000 vertical : 200 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was the PF with autoplt engaged. TCASII sounded 'traffic, traffic.' we noticed co-altitude traffic at 11 O'clock, approximately 10 mi. ATC then told us to turn to 270 degrees (from 220 degrees) and 'descend immediately to FL230.' we heard ZID tell the other aircraft to 'climb immediately to FL330.' my first officer said the closest range to the target was 2 1/2 mi and 200 ft vertical. An near midair collision report was filed with ZID after completion of the flight. ZID quality control telephoned me at home later that day and informed me a controller error had occurred.
Original NASA ASRS Text
Title: 2 ACR FLTS ARE GIVEN TURNS AND AMENDED ALT ASSIGNMENTS WHEN ZID CTLR REALIZES THAT THERE IS A TFC CONFLICT. SYS ERROR OCCURRED.
Narrative: I WAS THE PF WITH AUTOPLT ENGAGED. TCASII SOUNDED 'TFC, TFC.' WE NOTICED CO-ALT TFC AT 11 O'CLOCK, APPROX 10 MI. ATC THEN TOLD US TO TURN TO 270 DEGS (FROM 220 DEGS) AND 'DSND IMMEDIATELY TO FL230.' WE HEARD ZID TELL THE OTHER ACFT TO 'CLB IMMEDIATELY TO FL330.' MY FO SAID THE CLOSEST RANGE TO THE TARGET WAS 2 1/2 MI AND 200 FT VERT. AN NMAC RPT WAS FILED WITH ZID AFTER COMPLETION OF THE FLT. ZID QUALITY CTL TELEPHONED ME AT HOME LATER THAT DAY AND INFORMED ME A CTLR ERROR HAD OCCURRED.
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.