Narrative:

On climb out from okc, intermediate leveloff at 17000 ft MSL for opposite traffic at FL180. Noticed opposite direction target on TCASII at 12 mi, climbing through 16000 ft MSL, not the traffic called by ATC. That target reached 17000 ft, and we inquired with controller, who acknowledged the traffic on her radar. We made a 45 degree left turn off course and advised the controller. We received a TCASII RA and obtained visual contact with the traffic which passed about 1 mi to the right at our altitude. Without turning, our aircraft would have passed at the same altitude with little or no separation. The aircraft appeared to be a single engine retractable.

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Original NASA ASRS Text

Title: A B737 TURNS OFF COURSE TO AVOID SMA NORAC TFC CLBING THROUGH 17000 FT THAT WAS NOT CALLED OUT BY ATC. TCASII ALERTED THE CREW 46 MI SW OF TUL, OK.

Narrative: ON CLBOUT FROM OKC, INTERMEDIATE LEVELOFF AT 17000 FT MSL FOR OPPOSITE TFC AT FL180. NOTICED OPPOSITE DIRECTION TARGET ON TCASII AT 12 MI, CLBING THROUGH 16000 FT MSL, NOT THE TFC CALLED BY ATC. THAT TARGET REACHED 17000 FT, AND WE INQUIRED WITH CTLR, WHO ACKNOWLEDGED THE TFC ON HER RADAR. WE MADE A 45 DEG L TURN OFF COURSE AND ADVISED THE CTLR. WE RECEIVED A TCASII RA AND OBTAINED VISUAL CONTACT WITH THE TFC WHICH PASSED ABOUT 1 MI TO THE R AT OUR ALT. WITHOUT TURNING, OUR ACFT WOULD HAVE PASSED AT THE SAME ALT WITH LITTLE OR NO SEPARATION. THE ACFT APPEARED TO BE A SINGLE ENG RETRACTABLE.

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.