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After air carrier X received TA from TCASII on opposite direction traffic, controller issued immediate descent to FL370 to air carrier X and immediate climb to FL410 to air carrier Y. Both aircraft had been assigned FL390.
| Attributes | |
| ACN | 401965 |
| Time | |
| Date | 199805 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : vhp |
| State Reference | IN |
| Altitude | msl bound lower : 39000 msl bound upper : 39000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid tower : mci |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 401965 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 401667 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 360 vertical : 1200 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Wbound FL390 over vhp, got a TA on the TCASII. 5 seconds later got immediate descent instructions from center to FL370. Initiated descent, got an RA to descend now from TCASII. As we were descending ATC gave air carrier Y immediate climb from FL390 to FL410. Air carrier Y was eastbound our altitude. We had air carrier Y in sight from the moment we got the TA from TCASII. Air carrier Y passed overhead by about 1100 ft.
Original NASA ASRS Text
Title: AFTER ACR X RECEIVED TA FROM TCASII ON OPPOSITE DIRECTION TFC, CTLR ISSUED IMMEDIATE DSCNT TO FL370 TO ACR X AND IMMEDIATE CLB TO FL410 TO ACR Y. BOTH ACFT HAD BEEN ASSIGNED FL390.
Narrative: WBOUND FL390 OVER VHP, GOT A TA ON THE TCASII. 5 SECONDS LATER GOT IMMEDIATE DSCNT INSTRUCTIONS FROM CTR TO FL370. INITIATED DSCNT, GOT AN RA TO DSND NOW FROM TCASII. AS WE WERE DSNDING ATC GAVE ACR Y IMMEDIATE CLB FROM FL390 TO FL410. ACR Y WAS EBOUND OUR ALT. WE HAD ACR Y IN SIGHT FROM THE MOMENT WE GOT THE TA FROM TCASII. ACR Y PASSED OVERHEAD BY ABOUT 1100 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.