Narrative:

I was working a satellite radar position at D10 known as meacham south (ms) in a north flow. The meacham south position has a prearranged coordination area through feeder west 2 (FW2) airspace in order to climb the departing turboprops above the arrs. I had climbed 2 departing turboprops to 10000 ft, and they were to be handed off to waco approach, who requires them to be at 10000 ft. I was extremely busy with lower level VFR and IFR traffic into at least 4 different airports. I vectored the sbound turboprops into the normal corridor used for this to avoid descending jets and propellers. When the first propeller was about 20 mi southwest of dfw, sbound, he told me he saw a jet at his altitude, at 2 O'clock position, and told me he was descending to 9000 ft. I, having not seen the jet was surprised, told him to maintain visual separation and descend to 9000 ft. He then responded to his TCASII with a descent. The MD80 responded to his TCASII with a climb to 11000 ft. The MD80 descended again to 10000 ft and conflicted with the second turboprop. I established visual and turned the second propeller to avoid the MD80. Problem: the prearranged coordination area is a successful tool when all aircraft follow normal flight paths and descent rates. The MD80 was high coming into the airspace from ZFW and did not meet altitude or speed restrs. The FW2 controller was distracted by another problem and did not notice the MD80's failure to descend in the normal arrival profile. I, as the meacham south controller, am basing my separation on what FW2 should do without many choices, but extreme last min vectors. Resolution: I have proposed a change in procedure to climb the departing propellers to 12000 ft and change the LOA with waco approach to reflect them receiving such aircraft at 12000 ft. This will take some pressure off the FW2 controller whose highest arrival comes in at 11000 ft. We already do this for northbound turboprops in a south flow and it works well.

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Original NASA ASRS Text

Title: DFW CTLR CLBED 2 TURBOPROPS TO COMPLY WITH INTRAFAC PROCS AND CONFLICTED WITH DSNDING MD80 SEQUENCED FOR ARR. THE MD80 AFTER RESPONDING TO THE FIRST TCASII CLB RA DSNDED BACK TO 10000 FT AND CONFLICTED WITH THE SECOND CLBING TURBOPROP.

Narrative: I WAS WORKING A SATELLITE RADAR POS AT D10 KNOWN AS MEACHAM S (MS) IN A N FLOW. THE MEACHAM S POS HAS A PREARRANGED COORD AREA THROUGH FEEDER W 2 (FW2) AIRSPACE IN ORDER TO CLB THE DEPARTING TURBOPROPS ABOVE THE ARRS. I HAD CLBED 2 DEPARTING TURBOPROPS TO 10000 FT, AND THEY WERE TO BE HANDED OFF TO WACO APCH, WHO REQUIRES THEM TO BE AT 10000 FT. I WAS EXTREMELY BUSY WITH LOWER LEVEL VFR AND IFR TFC INTO AT LEAST 4 DIFFERENT ARPTS. I VECTORED THE SBOUND TURBOPROPS INTO THE NORMAL CORRIDOR USED FOR THIS TO AVOID DSNDING JETS AND PROPS. WHEN THE FIRST PROP WAS ABOUT 20 MI SW OF DFW, SBOUND, HE TOLD ME HE SAW A JET AT HIS ALT, AT 2 O'CLOCK POS, AND TOLD ME HE WAS DSNDING TO 9000 FT. I, HAVING NOT SEEN THE JET WAS SURPRISED, TOLD HIM TO MAINTAIN VISUAL SEPARATION AND DSND TO 9000 FT. HE THEN RESPONDED TO HIS TCASII WITH A DSCNT. THE MD80 RESPONDED TO HIS TCASII WITH A CLB TO 11000 FT. THE MD80 DSNDED AGAIN TO 10000 FT AND CONFLICTED WITH THE SECOND TURBOPROP. I ESTABLISHED VISUAL AND TURNED THE SECOND PROP TO AVOID THE MD80. PROB: THE PREARRANGED COORD AREA IS A SUCCESSFUL TOOL WHEN ALL ACFT FOLLOW NORMAL FLT PATHS AND DSCNT RATES. THE MD80 WAS HIGH COMING INTO THE AIRSPACE FROM ZFW AND DID NOT MEET ALT OR SPD RESTRS. THE FW2 CTLR WAS DISTRACTED BY ANOTHER PROB AND DID NOT NOTICE THE MD80'S FAILURE TO DSND IN THE NORMAL ARR PROFILE. I, AS THE MEACHAM S CTLR, AM BASING MY SEPARATION ON WHAT FW2 SHOULD DO WITHOUT MANY CHOICES, BUT EXTREME LAST MIN VECTORS. RESOLUTION: I HAVE PROPOSED A CHANGE IN PROC TO CLB THE DEPARTING PROPS TO 12000 FT AND CHANGE THE LOA WITH WACO APCH TO REFLECT THEM RECEIVING SUCH ACFT AT 12000 FT. THIS WILL TAKE SOME PRESSURE OFF THE FW2 CTLR WHOSE HIGHEST ARR COMES IN AT 11000 FT. WE ALREADY DO THIS FOR NBOUND TURBOPROPS IN A S FLOW AND IT WORKS WELL.

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.