Narrative:

In cruise at FL350 ZME cleared flight to descend to FL290. While descending through FL310, center requested that we expedite to FL290 and at the same time, we got a TCASII TA. At FL300 we got a TCASII RA and a 'climb' command from TCASII. There was opposite direction traffic at FL290 (visual contact also) and we climbed up to FL310. I informed ZME that we were responding to a TCASII resolution conflict and were climbing. Opposing traffic also stated that they had a TCASII warning. Resolution was cleared and we were given a frequency change. We were then cleared to a lower altitude by the new controller and the graham arrival into nashville. No comments at all from any controllers. Perhaps the original controller meant to clear my flight to FL280 or lower, but stated FL290 as the descent altitude. I know I read back FL290 as the descent altitude. Conclusion, TCASII does work.

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Original NASA ASRS Text

Title: ACR ON DSCNT RECEIVES TCASII RE DUE TFC OPPOSITE DIRECTION AT THEIR ASSIGNED ALT.

Narrative: IN CRUISE AT FL350 ZME CLRED FLT TO DSND TO FL290. WHILE DSNDING THROUGH FL310, CTR REQUESTED THAT WE EXPEDITE TO FL290 AND AT THE SAME TIME, WE GOT A TCASII TA. AT FL300 WE GOT A TCASII RA AND A 'CLB' COMMAND FROM TCASII. THERE WAS OPPOSITE DIRECTION TFC AT FL290 (VISUAL CONTACT ALSO) AND WE CLBED UP TO FL310. I INFORMED ZME THAT WE WERE RESPONDING TO A TCASII RESOLUTION CONFLICT AND WERE CLBING. OPPOSING TFC ALSO STATED THAT THEY HAD A TCASII WARNING. RESOLUTION WAS CLRED AND WE WERE GIVEN A FREQ CHANGE. WE WERE THEN CLRED TO A LOWER ALT BY THE NEW CTLR AND THE GRAHAM ARR INTO NASHVILLE. NO COMMENTS AT ALL FROM ANY CTLRS. PERHAPS THE ORIGINAL CTLR MEANT TO CLR MY FLT TO FL280 OR LOWER, BUT STATED FL290 AS THE DSCNT ALT. I KNOW I READ BACK FL290 AS THE DSCNT ALT. CONCLUSION, TCASII DOES WORK.

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.