Narrative:

I was the captain, as we were descending on the cedar creek arrival, during north operation at dfw. Just prior to howdy, we were given a vector of 325 degrees to intercept the localizer for runway 31R and given the frequency 111.9. The correct frequency is 110.9. Less than 1 min later, while descending through about 10700 ft, approach called traffic at 10500 ft. TCASII almost simultaneously gave us a traffic alert quickly followed by an RA to descend. First officer was the PF and he increased our rate of descent and turned left to avoid the traffic. Approach then called the traffic again at 2 O'clock position and 10500 ft. We observed a light, low wing, single engine airplane at approximately 1 to 1.5 mi. By the time we saw him, he was already above us and passing behind. The WX was scattered cumulus clouds from approximately 5000 ft to 12000 ft. We returned to the vector heading and intercepted the localizer and landed without further incident.

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Original NASA ASRS Text

Title: AN MD-88 CAPT RPTED THAT, DURING APCH TO DFW, HIS TCASII ISSUED AN RA IN RESPONSE TO A SINGLE ENG ACFT.

Narrative: I WAS THE CAPT, AS WE WERE DSNDING ON THE CEDAR CREEK ARR, DURING N OP AT DFW. JUST PRIOR TO HOWDY, WE WERE GIVEN A VECTOR OF 325 DEGS TO INTERCEPT THE LOC FOR RWY 31R AND GIVEN THE FREQ 111.9. THE CORRECT FREQ IS 110.9. LESS THAN 1 MIN LATER, WHILE DSNDING THROUGH ABOUT 10700 FT, APCH CALLED TFC AT 10500 FT. TCASII ALMOST SIMULTANEOUSLY GAVE US A TFC ALERT QUICKLY FOLLOWED BY AN RA TO DSND. FO WAS THE PF AND HE INCREASED OUR RATE OF DSCNT AND TURNED L TO AVOID THE TFC. APCH THEN CALLED THE TFC AGAIN AT 2 O'CLOCK POS AND 10500 FT. WE OBSERVED A LIGHT, LOW WING, SINGLE ENG AIRPLANE AT APPROX 1 TO 1.5 MI. BY THE TIME WE SAW HIM, HE WAS ALREADY ABOVE US AND PASSING BEHIND. THE WX WAS SCATTERED CUMULUS CLOUDS FROM APPROX 5000 FT TO 12000 FT. WE RETURNED TO THE VECTOR HDG AND INTERCEPTED THE LOC AND LANDED WITHOUT FURTHER INCIDENT.

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.