RPTR CLAIMS A POSSIBLE LOSS OF SEPARATION WITH ANOTHER ACR AT THE SAME ALT.

Narrative

ON THE CQY ARR; WAS GIVEN THE ATC INSTRUCTION TURN L TO HDG 180 DEGS. AS I; THE CAPT AND THE PF; REACHED FOR THE HDG SELECT KNOB ON THE FMP; THE CTLR AGAIN CALLED AND SAID IMMEDIATELY TURN TO 180 DEGS. MY FIRST INCLINATION WAS 'LOSS OF SEPARATION' AND DURING THE HDG CHANGE I VISUALLY ACQUIRED AND TCASII ACQUIRED A TARGET AT 12 O'CLOCK LESS THAN 10 NM; XING L TO R. IT APPEARED TO BE AN MD80 BUT I'M NOT SURE. THE CTLR THEN ISSUED A DSCNT FOR MY ACFT AND A CLB FOR THE OTHER. AS THE TARGET CLOSED TO ABOUT 5 NM; TCASII ISSUED A TA BUT NOT AN RA. AT THAT POINT WE WERE OBTAINING SOME VERT SEPARATION; AS WELL. MY FO QUERIED ZFW ABOUT THE POSSIBLE LOSS OF SEPARATION SEVERAL TIMES; AND WAS GIVEN A PHONE NUMBER TO CONTACT. ALSO; AT THIS TIME; A CTLR OF A DISTINGUISHABLY DIFFERENT VOICE ASSUMED CTL OF OUR FLT. SHORTLY THEREAFTER; WE REJOINED THE ARR; RECEIVED A FREQ CHANGE; AND CONTINUED TO DFW WITHOUT FURTHER INCIDENT. UPON ARR; I CONTACTED THE PHONE NUMBER GIVEN AND WAS TOLD THAT THEY WERE ALL IN A MEETING PLAYING BACK THE TAPES. I WAS SUBSEQUENTLY GIVEN A DIFFERENT PHONE NUMBER TO CONTACT THE AREA MGR. HOWEVER; THE MEETING CONTINUED; AND I WAS NEVER ABLE TO DISCUSS THE MATTER. MY SUMMATION IS THAT THERE WAS A LOSS OF SEPARATION; ALTHOUGH THE CTLR CAUGHT THE IMPENDING DISASTER AND RECTIFIED IT WITH A HDG CHANGE. WITH MY ND SET AT 240; TFC WASN'T NOTICED EARLY.