Narrative:

ZNY (emih) requested that I (ZDC, pot-H, R04) take aircraft X (swbound on J75) at FL370 wrong altitude for direction, which I approved. I requested the same from shd-H R72 and was told unable, they needed him at right altitude for direction. At time of handoff, there was a FL350 in close to aircraft X, also ZNY did not xfer communication until repeated requests were made and aircraft X was 40-50 mi in my sector. When aircraft X came on my frequency, I asked if he could accept FL390, he replied negative. So I cleared him to make 360 degree turn to right and I would have lower shortly once clear of lower traffic. I descended aircraft X to FL350, aircraft Y was at this time 60-70 mi northeast at FL350. I asked aircraft X to make tight turn and descend to FL330. Aircraft X was very slow in his descent and slower in his turn. Aircraft Y was given right turn to 270 degrees, later 20 seconds to 300 degrees, later to 330 degrees -- still at FL350. Called traffic. Aircraft Y reported traffic in sight. Aircraft X still slow in turn and very slow in descent. Loss of separation occurred shortly thereafter. Aircraft X still not level at FL330. Had to climb another aircraft to FL360 to insure 2000 ft separation. TCASII alert occurred for aircraft X with aircraft Y.

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Original NASA ASRS Text

Title: RPTR STATES LOST STANDARD SEPARATION BTWN ACFT X AND ACFT Y AS HE ATTEMPTED TO KEEP THEM APART.

Narrative: ZNY (EMIH) REQUESTED THAT I (ZDC, POT-H, R04) TAKE ACFT X (SWBOUND ON J75) AT FL370 WRONG ALT FOR DIRECTION, WHICH I APPROVED. I REQUESTED THE SAME FROM SHD-H R72 AND WAS TOLD UNABLE, THEY NEEDED HIM AT RIGHT ALT FOR DIRECTION. AT TIME OF HDOF, THERE WAS A FL350 IN CLOSE TO ACFT X, ALSO ZNY DID NOT XFER COM UNTIL REPEATED REQUESTS WERE MADE AND ACFT X WAS 40-50 MI IN MY SECTOR. WHEN ACFT X CAME ON MY FREQ, I ASKED IF HE COULD ACCEPT FL390, HE REPLIED NEGATIVE. SO I CLRED HIM TO MAKE 360 DEG TURN TO R AND I WOULD HAVE LOWER SHORTLY ONCE CLR OF LOWER TFC. I DSNDED ACFT X TO FL350, ACFT Y WAS AT THIS TIME 60-70 MI NE AT FL350. I ASKED ACFT X TO MAKE TIGHT TURN AND DSND TO FL330. ACFT X WAS VERY SLOW IN HIS DSCNT AND SLOWER IN HIS TURN. ACFT Y WAS GIVEN R TURN TO 270 DEGS, LATER 20 SECONDS TO 300 DEGS, LATER TO 330 DEGS -- STILL AT FL350. CALLED TFC. ACFT Y RPTED TFC IN SIGHT. ACFT X STILL SLOW IN TURN AND VERY SLOW IN DSCNT. LOSS OF SEPARATION OCCURRED SHORTLY THEREAFTER. ACFT X STILL NOT LEVEL AT FL330. HAD TO CLB ANOTHER ACFT TO FL360 TO INSURE 2000 FT SEPARATION. TCASII ALERT OCCURRED FOR ACFT X WITH ACFT Y.

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.