Narrative:

We were en route from mgm to mem in cruise flight at 6000 ft. When about 20 mi northeast of columbus AFB, we noticed traffic on TCASII at about 2 O'clock. The traffic went from white to yellow to red within a few seconds. When the traffic turned to a solid white diamond we started looking for the traffic. The altitude display was changing rapidly and the target was moving toward us very fast. Seconds later I saw a dash 9 and a yellow circle and heard 'traffic, traffic.' almost immediately I saw a red square with -3 and heard a loud 'climb, climb.' I immediately initiated a climb with my first officer doing the same. The first officer was looking outside and spotted 2 T38's coming toward us in formation just as we got the RA. The RA was for a 2000 FPM climb which we held until the RA cleared at 7100 ft. The first officer said he saw 2 aircraft come from about a 2:30 O'clock position to about our 7 O'clock position passing under us. I called columbus approach control and told them that we had had an RA and we were returning to our assigned altitude of 6000 ft. I asked columbus approach control about the traffic and they said 'your traffic is level at 4000 ft.' I said, 'no, they are not at 4000 ft. They just passed within 300 ft vertically of our aircraft.' columbus came back and repeated that our traffic was level at 4000 ft. I repeated, 'no, they are not at 4000 ft, they just passed within 300 ft vertically of our aircraft.' our TCASII showed that they climbed very fast and were at 5700 ft when we started our climb to comply with the RA. We were never advised by columbus approach control about this traffic.

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Original NASA ASRS Text

Title: AN SF340 RECEIVES A TCASII RA WHILE FLYING CLOSE BY CBM AFB AS 2 T38 TRAINERS FLY DIRECTLY UNDERNEATH.

Narrative: WE WERE ENRTE FROM MGM TO MEM IN CRUISE FLT AT 6000 FT. WHEN ABOUT 20 MI NE OF COLUMBUS AFB, WE NOTICED TFC ON TCASII AT ABOUT 2 O'CLOCK. THE TFC WENT FROM WHITE TO YELLOW TO RED WITHIN A FEW SECONDS. WHEN THE TFC TURNED TO A SOLID WHITE DIAMOND WE STARTED LOOKING FOR THE TFC. THE ALT DISPLAY WAS CHANGING RAPIDLY AND THE TARGET WAS MOVING TOWARD US VERY FAST. SECONDS LATER I SAW A DASH 9 AND A YELLOW CIRCLE AND HEARD 'TFC, TFC.' ALMOST IMMEDIATELY I SAW A RED SQUARE WITH -3 AND HEARD A LOUD 'CLB, CLB.' I IMMEDIATELY INITIATED A CLB WITH MY FO DOING THE SAME. THE FO WAS LOOKING OUTSIDE AND SPOTTED 2 T38'S COMING TOWARD US IN FORMATION JUST AS WE GOT THE RA. THE RA WAS FOR A 2000 FPM CLB WHICH WE HELD UNTIL THE RA CLRED AT 7100 FT. THE FO SAID HE SAW 2 ACFT COME FROM ABOUT A 2:30 O'CLOCK POS TO ABOUT OUR 7 O'CLOCK POS PASSING UNDER US. I CALLED COLUMBUS APCH CTL AND TOLD THEM THAT WE HAD HAD AN RA AND WE WERE RETURNING TO OUR ASSIGNED ALT OF 6000 FT. I ASKED COLUMBUS APCH CTL ABOUT THE TFC AND THEY SAID 'YOUR TFC IS LEVEL AT 4000 FT.' I SAID, 'NO, THEY ARE NOT AT 4000 FT. THEY JUST PASSED WITHIN 300 FT VERTLY OF OUR ACFT.' COLUMBUS CAME BACK AND REPEATED THAT OUR TFC WAS LEVEL AT 4000 FT. I REPEATED, 'NO, THEY ARE NOT AT 4000 FT, THEY JUST PASSED WITHIN 300 FT VERTLY OF OUR ACFT.' OUR TCASII SHOWED THAT THEY CLBED VERY FAST AND WERE AT 5700 FT WHEN WE STARTED OUR CLB TO COMPLY WITH THE RA. WE WERE NEVER ADVISED BY COLUMBUS APCH CTL ABOUT THIS TFC.

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.