Narrative:

At approximately XA53Z, we were en route from hkg to icn. Navigating northbound on airway B576 between cju and kwa vors, incheon control (rkrr) directed us to descend from FL330 to FL290. While descending through FL310, and between 40-36 DME south of kwa, an aircraft appeared on our TCASII display at the 12 - 1 O'clock position, indicating -900 ft and reducing vertical separation rapidly. Because the WX was VMC, our crew saw the opposing aircraft. We leveled off, but the opposing aircraft appeared to be climbing into our flight path. We then immediately began a left turn away from the traffic and observed the opposing traffic performing the same maneuver (turning left away from us). During this time, the TCASII turned red in color and announced traffic, but did not give a climb or descend command. At the same time, incheon control directed us to turn right, which would have turned us into the traffic. We continued to disregard incheon control's instructions and took our own evasive action to avoid a collision. It is our estimate that horizontal separation was no closer than 2000 ft when the aircraft passed each other. The TCASII announced 'clear of traffic' after we resolved the conflict. After returning to course and continuing descent to FL290, we queried incheon control and voiced a complaint. Incheon control temporarily dismissed himself, then reported to us that he had made a mistake and apologized. Incheon control asked if we had received a TCASII RA and we answered in the affirmative. He apologized again (it sounded like the same controller). Upon arriving in icn, I called gcc, spoke with the supervisor and gave notice that I would be filing this report.

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Original NASA ASRS Text

Title: RKRR ARTCC RADAR LOST SEPARATION BTWN DSNDING AND CLBING ACR'S.

Narrative: AT APPROX XA53Z, WE WERE ENRTE FROM HKG TO ICN. NAVING NBOUND ON AIRWAY B576 BTWN CJU AND KWA VORS, INCHEON CTL (RKRR) DIRECTED US TO DSND FROM FL330 TO FL290. WHILE DSNDING THROUGH FL310, AND BTWN 40-36 DME S OF KWA, AN ACFT APPEARED ON OUR TCASII DISPLAY AT THE 12 - 1 O'CLOCK POS, INDICATING -900 FT AND REDUCING VERT SEPARATION RAPIDLY. BECAUSE THE WX WAS VMC, OUR CREW SAW THE OPPOSING ACFT. WE LEVELED OFF, BUT THE OPPOSING ACFT APPEARED TO BE CLBING INTO OUR FLT PATH. WE THEN IMMEDIATELY BEGAN A L TURN AWAY FROM THE TFC AND OBSERVED THE OPPOSING TFC PERFORMING THE SAME MANEUVER (TURNING L AWAY FROM US). DURING THIS TIME, THE TCASII TURNED RED IN COLOR AND ANNOUNCED TFC, BUT DID NOT GIVE A CLB OR DSND COMMAND. AT THE SAME TIME, INCHEON CTL DIRECTED US TO TURN R, WHICH WOULD HAVE TURNED US INTO THE TFC. WE CONTINUED TO DISREGARD INCHEON CTL'S INSTRUCTIONS AND TOOK OUR OWN EVASIVE ACTION TO AVOID A COLLISION. IT IS OUR ESTIMATE THAT HORIZ SEPARATION WAS NO CLOSER THAN 2000 FT WHEN THE ACFT PASSED EACH OTHER. THE TCASII ANNOUNCED 'CLR OF TFC' AFTER WE RESOLVED THE CONFLICT. AFTER RETURNING TO COURSE AND CONTINUING DSCNT TO FL290, WE QUERIED INCHEON CTL AND VOICED A COMPLAINT. INCHEON CTL TEMPORARILY DISMISSED HIMSELF, THEN RPTED TO US THAT HE HAD MADE A MISTAKE AND APOLOGIZED. INCHEON CTL ASKED IF WE HAD RECEIVED A TCASII RA AND WE ANSWERED IN THE AFFIRMATIVE. HE APOLOGIZED AGAIN (IT SOUNDED LIKE THE SAME CTLR). UPON ARRIVING IN ICN, I CALLED GCC, SPOKE WITH THE SUPVR AND GAVE NOTICE THAT I WOULD BE FILING THIS RPT.

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.