Narrative:

During climb out of atl runway 9L clearance 'runway heading up to 10000 ft.' at approximately 7000 ft with autoplt on, I noticed a target on the TCASII approximately 3 NM ahead 11-12 O'clock position, +800 ft on level flight. As I reached for the autoplt disconnect switch I called the traffic to the attention of the captain. Almost simultaneously we received a TCASII TA then RA, 'traffic, traffic, climb crossing climb.' also ATC called at the same time with an immediate right turn to 140 degree heading. I disconnected autoplt and banked to the right 30 degree bank, I increased rate of climb to reach green arc on TCASII/vsi indicator. This required 2500 FPM. After crossing 8500 ft MSL we received a 'cleared of conflict' from TCASII and a new clearance to 14000 ft MSL with a left turn to 070 degree heading. After landing we called ATC. They indicated the conflicting traffic was a twin cessna on an IFR clearance flying inbtwn 2 ATC sectors. ATC had apparently not switched him to the proper frequency or controller. We never got visual contact with the traffic. Departure corridors should only be 1 ATC sector.

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Original NASA ASRS Text

Title: AN ACR FLC DEPARTING FROM ATL IN AN MD88 RPTS A TCASII RA AND NMAC.

Narrative: DURING CLBOUT OF ATL RWY 9L CLRNC 'RWY HEADING UP TO 10000 FT.' AT APPROX 7000 FT WITH AUTOPLT ON, I NOTICED A TARGET ON THE TCASII APPROX 3 NM AHEAD 11-12 O'CLOCK POS, +800 FT ON LEVEL FLT. AS I REACHED FOR THE AUTOPLT DISCONNECT SWITCH I CALLED THE TFC TO THE ATTN OF THE CAPT. ALMOST SIMULTANEOUSLY WE RECEIVED A TCASII TA THEN RA, 'TFC, TFC, CLB XING CLB.' ALSO ATC CALLED AT THE SAME TIME WITH AN IMMEDIATE R TURN TO 140 DEG HDG. I DISCONNECTED AUTOPLT AND BANKED TO THE R 30 DEG BANK, I INCREASED RATE OF CLB TO REACH GREEN ARC ON TCASII/VSI INDICATOR. THIS REQUIRED 2500 FPM. AFTER XING 8500 FT MSL WE RECEIVED A 'CLRED OF CONFLICT' FROM TCASII AND A NEW CLRNC TO 14000 FT MSL WITH A L TURN TO 070 DEG HDG. AFTER LNDG WE CALLED ATC. THEY INDICATED THE CONFLICTING TFC WAS A TWIN CESSNA ON AN IFR CLRNC FLYING INBTWN 2 ATC SECTORS. ATC HAD APPARENTLY NOT SWITCHED HIM TO THE PROPER FREQ OR CTLR. WE NEVER GOT VISUAL CONTACT WITH THE TFC. DEP CORRIDORS SHOULD ONLY BE 1 ATC SECTOR.

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.