Narrative:

During climb out from stl, we were sbound on the stl lindy 2 departure, missed approach transition climbing to 6000 ft assigned. We received a garbled transmission to climb to 15000 ft with our flight number transposed. After attempting to verify the climb instructions, no verification was received, but we were told to contact ZKC. I did not climb, but remained at 6000 ft and again queried our climb instructions. No answer was received and we contacted ZKC. During initial call on TCASII, gave us an urgent 'climb, climb' alert due to an aircraft at our 10 O'clock position and 5800 ft climbing. I responded immediately with a maximum performance climb. At 7600 ft, we received 'clear of conflict,' interrupted by an urgent 'descend, descend' command for traffic (emb jet) at our 1 O'clock position and 1/2 mi at 7500 ft and descending. We complied. Upon contact with ZKC, we were returned to stl departure who again cleared us to 15000 ft and returned us again to ZKC. No further conflicts or mentions of this occurrence have occurred.

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Original NASA ASRS Text

Title: MD83 FLC, ATTEMPTING TO CONFIRM ALT ASSIGNMENT CLB FROM T75, IS ISSUED A COM XFER TO ZKC AND IMMEDIATELY INITIATES TCASII RA MANEUVER DUE TO 2 OTHER ACFT IN THE SAME AREA.

Narrative: DURING CLBOUT FROM STL, WE WERE SBOUND ON THE STL LINDY 2 DEP, MISSED APCH TRANSITION CLBING TO 6000 FT ASSIGNED. WE RECEIVED A GARBLED XMISSION TO CLB TO 15000 FT WITH OUR FLT NUMBER TRANSPOSED. AFTER ATTEMPTING TO VERIFY THE CLB INSTRUCTIONS, NO VERIFICATION WAS RECEIVED, BUT WE WERE TOLD TO CONTACT ZKC. I DID NOT CLB, BUT REMAINED AT 6000 FT AND AGAIN QUERIED OUR CLB INSTRUCTIONS. NO ANSWER WAS RECEIVED AND WE CONTACTED ZKC. DURING INITIAL CALL ON TCASII, GAVE US AN URGENT 'CLB, CLB' ALERT DUE TO AN ACFT AT OUR 10 O'CLOCK POS AND 5800 FT CLBING. I RESPONDED IMMEDIATELY WITH A MAX PERFORMANCE CLB. AT 7600 FT, WE RECEIVED 'CLR OF CONFLICT,' INTERRUPTED BY AN URGENT 'DSND, DSND' COMMAND FOR TFC (EMB JET) AT OUR 1 O'CLOCK POS AND 1/2 MI AT 7500 FT AND DSNDING. WE COMPLIED. UPON CONTACT WITH ZKC, WE WERE RETURNED TO STL DEP WHO AGAIN CLRED US TO 15000 FT AND RETURNED US AGAIN TO ZKC. NO FURTHER CONFLICTS OR MENTIONS OF THIS OCCURRENCE HAVE OCCURRED.

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.