Narrative:

Nov/xa/01 at XA55Z, VMC. I was the PF. While being vectored by ATP approach for visual approach to atl runway 27L, we received and complied with a TCASII RA to climb out of our assigned altitude. We were at an assigned altitude of 5000 ft heading 355 degrees at 210 KIAS on a base leg south of the runway 27L localizer. We had visual on the B757 traffic on final approach at 12 O'clock position, 3 mi, wbound on runway 27L localizer at 4000 ft. There was further traffic, a DC9 on downwind at our 9 O'clock position, 3 mi eastbound, also at 5000 ft. It was at this time when we received TCASII TA 'traffic, traffic.' the captain acquired visual contact of the TA traffic, however, I did not. At this time the approach controller instructed us to amend altitude to 4500 ft. Final monitor then called, 'company rj traffic 12 O'clock position, 3 mi on the north side at 5000 ft.' before monitor control finished talking, TCASII issued RA, 'climb, climb.' I immediately initiated a climb. The captain radioed to final monitor that we previously had the traffic, but were complying with an RA. TCASII RA then called 'increase climb,' and 'monitor vertical speed.' I complied with all TCASII instructions. I noticed the TCASII warnings were much louder than ATC and was only able to understand, 'heading 240 degrees.' I was aware of our position as being north of the runway 27L localizer and immediately turned O to the assigned heading of 240 degrees. The captain queried ATC, but got no response. While in the left turn, TCASII sounded a second TA, followed by RA 'climb, climb' in response to the next aircraft in the pattern on the north runway 26L. This aircraft was slightly below our altitude at our 12 O'clock position. The RA was of much shorter duration since we were already turning. When all warnings ended, the captain asked for and received our new clearance, 'descend to 4000 ft, heading 240 degrees and 180 KIAS to join the runway 27L localizer.' we were sequenced between the B757 traffic now on short final and the DC9 traffic 3 mi behind us. The remainder of the flight was uneventful.

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Original NASA ASRS Text

Title: CL65 CREW GOT MULTIPLE AND STRENGTHENED TCASII RA'S IN ATL CLASS B AIRSPACE.

Narrative: NOV/XA/01 AT XA55Z, VMC. I WAS THE PF. WHILE BEING VECTORED BY ATP APCH FOR VISUAL APCH TO ATL RWY 27L, WE RECEIVED AND COMPLIED WITH A TCASII RA TO CLB OUT OF OUR ASSIGNED ALT. WE WERE AT AN ASSIGNED ALT OF 5000 FT HDG 355 DEGS AT 210 KIAS ON A BASE LEG S OF THE RWY 27L LOC. WE HAD VISUAL ON THE B757 TFC ON FINAL APCH AT 12 O'CLOCK POS, 3 MI, WBOUND ON RWY 27L LOC AT 4000 FT. THERE WAS FURTHER TFC, A DC9 ON DOWNWIND AT OUR 9 O'CLOCK POS, 3 MI EBOUND, ALSO AT 5000 FT. IT WAS AT THIS TIME WHEN WE RECEIVED TCASII TA 'TFC, TFC.' THE CAPT ACQUIRED VISUAL CONTACT OF THE TA TFC, HOWEVER, I DID NOT. AT THIS TIME THE APCH CTLR INSTRUCTED US TO AMEND ALT TO 4500 FT. FINAL MONITOR THEN CALLED, 'COMPANY RJ TFC 12 O'CLOCK POS, 3 MI ON THE N SIDE AT 5000 FT.' BEFORE MONITOR CTL FINISHED TALKING, TCASII ISSUED RA, 'CLB, CLB.' I IMMEDIATELY INITIATED A CLB. THE CAPT RADIOED TO FINAL MONITOR THAT WE PREVIOUSLY HAD THE TFC, BUT WERE COMPLYING WITH AN RA. TCASII RA THEN CALLED 'INCREASE CLB,' AND 'MONITOR VERT SPD.' I COMPLIED WITH ALL TCASII INSTRUCTIONS. I NOTICED THE TCASII WARNINGS WERE MUCH LOUDER THAN ATC AND WAS ONLY ABLE TO UNDERSTAND, 'HDG 240 DEGS.' I WAS AWARE OF OUR POS AS BEING N OF THE RWY 27L LOC AND IMMEDIATELY TURNED O TO THE ASSIGNED HDG OF 240 DEGS. THE CAPT QUERIED ATC, BUT GOT NO RESPONSE. WHILE IN THE L TURN, TCASII SOUNDED A SECOND TA, FOLLOWED BY RA 'CLB, CLB' IN RESPONSE TO THE NEXT ACFT IN THE PATTERN ON THE N RWY 26L. THIS ACFT WAS SLIGHTLY BELOW OUR ALT AT OUR 12 O'CLOCK POS. THE RA WAS OF MUCH SHORTER DURATION SINCE WE WERE ALREADY TURNING. WHEN ALL WARNINGS ENDED, THE CAPT ASKED FOR AND RECEIVED OUR NEW CLRNC, 'DSND TO 4000 FT, HDG 240 DEGS AND 180 KIAS TO JOIN THE RWY 27L LOC.' WE WERE SEQUENCED BTWN THE B757 TFC NOW ON SHORT FINAL AND THE DC9 TFC 3 MI BEHIND US. THE REMAINDER OF THE FLT WAS UNEVENTFUL.

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.