Narrative:

X at FL270 landing aoo handed off to RO3. RO3 called d-side and said 'take down to 240 and give to RO1;' I thought Y was at FL280; gave X FL240. Went to take care of a situation in the eastern half of sector. I got back to western half of sector. Noticed the conflict and took action; turned Y to 360 degrees and climbed to FL270. Told X to expedite the descent. Supplemental information from acn 760532: mor called at the d-side position and requested that the aoo arrival be taken to FL240 and handed off to ekn. I relayed this information to the r-side. At this point; my d-side trainer started to review the SOP for aoo arrs and why they should be at FL270. After this; a few things happened that had to do with the frequency coverage and several clrncs had to be repeated. The conflict alert started going off when X was out of FL267 for FL240. The radar controller had given the descent to FL240 while my trainer and I were reviewing the SOP. The radar controller took evasive action; and the E145 responded to the TCAS alert after the radar controller had turned him out to avoid the king air.

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Original NASA ASRS Text

Title: ZDC CTLR EXPERIENCED OPERROR AT FL270 WHEN DISTRACTED BY OTHER SECTOR DUTIES AND ASSUMING ACFT WAS AT OTHER THAN ACTUAL ALT.

Narrative: X AT FL270 LNDG AOO HANDED OFF TO RO3. RO3 CALLED D-SIDE AND SAID 'TAKE DOWN TO 240 AND GIVE TO RO1;' I THOUGHT Y WAS AT FL280; GAVE X FL240. WENT TO TAKE CARE OF A SITUATION IN THE EASTERN HALF OF SECTOR. I GOT BACK TO WESTERN HALF OF SECTOR. NOTICED THE CONFLICT AND TOOK ACTION; TURNED Y TO 360 DEGS AND CLBED TO FL270. TOLD X TO EXPEDITE THE DSCNT. SUPPLEMENTAL INFO FROM ACN 760532: MOR CALLED AT THE D-SIDE POS AND REQUESTED THAT THE AOO ARR BE TAKEN TO FL240 AND HANDED OFF TO EKN. I RELAYED THIS INFO TO THE R-SIDE. AT THIS POINT; MY D-SIDE TRAINER STARTED TO REVIEW THE SOP FOR AOO ARRS AND WHY THEY SHOULD BE AT FL270. AFTER THIS; A FEW THINGS HAPPENED THAT HAD TO DO WITH THE FREQ COVERAGE AND SEVERAL CLRNCS HAD TO BE REPEATED. THE CONFLICT ALERT STARTED GOING OFF WHEN X WAS OUT OF FL267 FOR FL240. THE RADAR CTLR HAD GIVEN THE DSCNT TO FL240 WHILE MY TRAINER AND I WERE REVIEWING THE SOP. THE RADAR CTLR TOOK EVASIVE ACTION; AND THE E145 RESPONDED TO THE TCAS ALERT AFTER THE RADAR CTLR HAD TURNED HIM OUT TO AVOID THE KING AIR.

Data retrieved from NASA's ASRS site as of January 2009 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.