Narrative:

I was air carrier X flight from mdt to rdu, we were level at 22000 ft just south of iad and had just been handed off to ZDC. There was a lot of WX that evening so I had the TCASII screen on radar. ATC called traffic to me at 6 O'clock climbing, a jet. I thought ATC said he was climbing to 23000. He no more than called the traffic when I got a TA on TCASII. I switched the screen to TCASII and the traffic was approximately 1/2 mi at my 6 O'clock. In less than a second, the traffic on the TCASII screen turned from yellow to red and we received a command to climb. The rate on the vsi indicated about 2200 FPM. We immediately responded and I informed ATC we had an alert and were climbing. The controller was very unhappy and said that's why he pointed the traffic out to me. I feel this could have been avoided had he just delayed air carrier Y's climb about 30 seconds. ATC had only cleared air carrier Y to 21000 ft, but his rate of climb and his position gave me the RA on the TCASII.

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Original NASA ASRS Text

Title: ACR LTT RECEIVES TCASII RA ON CLBING SAME DIRECTION AFT OF HIM AND PERFORMS AN EVASIVE ACTION CLB.

Narrative: I WAS ACR X FLT FROM MDT TO RDU, WE WERE LEVEL AT 22000 FT JUST S OF IAD AND HAD JUST BEEN HANDED OFF TO ZDC. THERE WAS A LOT OF WX THAT EVENING SO I HAD THE TCASII SCREEN ON RADAR. ATC CALLED TFC TO ME AT 6 O'CLOCK CLBING, A JET. I THOUGHT ATC SAID HE WAS CLBING TO 23000. HE NO MORE THAN CALLED THE TFC WHEN I GOT A TA ON TCASII. I SWITCHED THE SCREEN TO TCASII AND THE TFC WAS APPROX 1/2 MI AT MY 6 O'CLOCK. IN LESS THAN A SECOND, THE TFC ON THE TCASII SCREEN TURNED FROM YELLOW TO RED AND WE RECEIVED A COMMAND TO CLB. THE RATE ON THE VSI INDICATED ABOUT 2200 FPM. WE IMMEDIATELY RESPONDED AND I INFORMED ATC WE HAD AN ALERT AND WERE CLBING. THE CTLR WAS VERY UNHAPPY AND SAID THAT'S WHY HE POINTED THE TFC OUT TO ME. I FEEL THIS COULD HAVE BEEN AVOIDED HAD HE JUST DELAYED ACR Y'S CLB ABOUT 30 SECONDS. ATC HAD ONLY CLRED ACR Y TO 21000 FT, BUT HIS RATE OF CLB AND HIS POS GAVE ME THE RA ON THE TCASII.

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.