Narrative:

Radio contact with ZNY 118.97 was very weak, almost unreadable. Several other aircraft complained. While climbing out of 15000 ft, TA showed on TCASII visual and verbal 'traffic.' IMC at the time. Could hear conflicting traffic trying to explain to ATC about traffic. TA then turns to RA. Autoplt was disconnected, power reduced, and descent immediately initiated to follow TCASII instructions from vsi. The traffic was then seen below us at 600 ft below and continued to descend. Advised ATC of the incident. Supplemental information from acn 409999: ATC cleared us to 17000 ft. While climbing through 15500 ft, ATC told us to descend to 14000 ft. We noticed a TCASII target at 11 O'clock position, same altitude and climbing (B727). We pitched over to descend at 1500 FPM. At the same time, we got an RA to climb. The TCASII target was at 12 O'clock position, 2 mi and 500 ft above. At that moment, the B727 declared they had an RA to descend. At the same time we received an RA to climb. The B727 began a descent, ATC told them not to descend. They continued descent for a few moments and passed +/-1 mi and 500 ft above our altitude. I banked left and the B727 passed off our right side. Due to the rapid descent rate and idle power, we couldn't react to the climb RA until we were below the traffic. We received a clear of conflict upon leveling at 14000 ft.

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Original NASA ASRS Text

Title: A DH8 ACFT GOING THROUGH 15500 FT CLBING TO 17000 FT WAS INSTRUCTED TO DSND TO 14000 FT DUE TO A B727 CLBING THROUGH THE SAME ALT. BOTH ACFT RECEIVE A TCASII RA, HOWEVER, EFFORTS BY THE CTLR TO MAINTAIN LEGAL SEPARATION OCCURRED TOO LATE.

Narrative: RADIO CONTACT WITH ZNY 118.97 WAS VERY WEAK, ALMOST UNREADABLE. SEVERAL OTHER ACFT COMPLAINED. WHILE CLBING OUT OF 15000 FT, TA SHOWED ON TCASII VISUAL AND VERBAL 'TFC.' IMC AT THE TIME. COULD HEAR CONFLICTING TFC TRYING TO EXPLAIN TO ATC ABOUT TFC. TA THEN TURNS TO RA. AUTOPLT WAS DISCONNECTED, PWR REDUCED, AND DSCNT IMMEDIATELY INITIATED TO FOLLOW TCASII INSTRUCTIONS FROM VSI. THE TFC WAS THEN SEEN BELOW US AT 600 FT BELOW AND CONTINUED TO DSND. ADVISED ATC OF THE INCIDENT. SUPPLEMENTAL INFO FROM ACN 409999: ATC CLRED US TO 17000 FT. WHILE CLBING THROUGH 15500 FT, ATC TOLD US TO DSND TO 14000 FT. WE NOTICED A TCASII TARGET AT 11 O'CLOCK POS, SAME ALT AND CLBING (B727). WE PITCHED OVER TO DSND AT 1500 FPM. AT THE SAME TIME, WE GOT AN RA TO CLB. THE TCASII TARGET WAS AT 12 O'CLOCK POS, 2 MI AND 500 FT ABOVE. AT THAT MOMENT, THE B727 DECLARED THEY HAD AN RA TO DSND. AT THE SAME TIME WE RECEIVED AN RA TO CLB. THE B727 BEGAN A DSCNT, ATC TOLD THEM NOT TO DSND. THEY CONTINUED DSCNT FOR A FEW MOMENTS AND PASSED +/-1 MI AND 500 FT ABOVE OUR ALT. I BANKED L AND THE B727 PASSED OFF OUR R SIDE. DUE TO THE RAPID DSCNT RATE AND IDLE PWR, WE COULDN'T REACT TO THE CLB RA UNTIL WE WERE BELOW THE TFC. WE RECEIVED A CLR OF CONFLICT UPON LEVELING AT 14000 FT.

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.