Narrative:

En route from ord-alb at 24000 ft, ATC advised us to turn 20 degrees right for descent and to descend to 11000 ft. A couple of mins later we were asked to cross 35 mi southwest alb at 13000 ft. Descent rate picked up to 1800 FPM. Whilst descending through 13500 ft, target on TCASII appeared and TA 'traffic' sounded. Through 13000 ft, RA sounded advising to arrest vertical descent followed by 'climb.' immediate autoplt disconnect and captain performed a climb from about 12500 ft. ATC told us to level at 13000 ft, which we did. ATC said we should have leveled at 13000 ft, I told them our clearance was to 11000 ft and cross 35 mi southwest alb at 13000 ft. During this time as we leveled at 13000 ft, I noticed a B737 left to right ahead and lower (about 4 mi ahead 1000 ft by TCASII readout). Conditions were good VFR and no conflict with traffic after TCASII action. On the ground, captain spoke to supervisor at ZBW who advised us that same sector made a mistake to other traffic less than 2 mins to our incident. I am sure that the turn 20 degrees right should have been 20 degrees left or maintain original heading which probably would have had us pass well behind conflicting traffic to the point it might never have been showed on TCASII. No advisory from ATC about any possible crossing/conflicting traffic was ever given.

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Original NASA ASRS Text

Title: CRJ FLT GIVEN DSCNT CLRNC FROM ZBW EXPERIENCED TCASII RA WITH B737 AT 13000 FT.

Narrative: ENRTE FROM ORD-ALB AT 24000 FT, ATC ADVISED US TO TURN 20 DEGS R FOR DSCNT AND TO DSND TO 11000 FT. A COUPLE OF MINS LATER WE WERE ASKED TO CROSS 35 MI SW ALB AT 13000 FT. DSCNT RATE PICKED UP TO 1800 FPM. WHILST DSNDING THROUGH 13500 FT, TARGET ON TCASII APPEARED AND TA 'TFC' SOUNDED. THROUGH 13000 FT, RA SOUNDED ADVISING TO ARREST VERT DSCNT FOLLOWED BY 'CLB.' IMMEDIATE AUTOPLT DISCONNECT AND CAPT PERFORMED A CLB FROM ABOUT 12500 FT. ATC TOLD US TO LEVEL AT 13000 FT, WHICH WE DID. ATC SAID WE SHOULD HAVE LEVELED AT 13000 FT, I TOLD THEM OUR CLRNC WAS TO 11000 FT AND CROSS 35 MI SW ALB AT 13000 FT. DURING THIS TIME AS WE LEVELED AT 13000 FT, I NOTICED A B737 L TO R AHEAD AND LOWER (ABOUT 4 MI AHEAD 1000 FT BY TCASII READOUT). CONDITIONS WERE GOOD VFR AND NO CONFLICT WITH TFC AFTER TCASII ACTION. ON THE GND, CAPT SPOKE TO SUPVR AT ZBW WHO ADVISED US THAT SAME SECTOR MADE A MISTAKE TO OTHER TFC LESS THAN 2 MINS TO OUR INCIDENT. I AM SURE THAT THE TURN 20 DEGS R SHOULD HAVE BEEN 20 DEGS L OR MAINTAIN ORIGINAL HDG WHICH PROBABLY WOULD HAVE HAD US PASS WELL BEHIND CONFLICTING TFC TO THE POINT IT MIGHT NEVER HAVE BEEN SHOWED ON TCASII. NO ADVISORY FROM ATC ABOUT ANY POSSIBLE XING/CONFLICTING TFC WAS EVER GIVEN.

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.