Narrative:

I was working moderate traffic in the south portion of cmh airspace. Air carrier X was a southwest departure to the west off cmh. After climbing him above an overflt at 6000' westbound, I turned air carrier X southwest to 230 degrees and 10000', the top of my airspace. ZID had an light transport Y inbound from the southwest, nebnd level at 11000'. I knew that the light transport and air carrier X would level for some time if I didn't ask for higher for air carrier X. I had plenty of room for the climb and air carrier X was still in the climb. ZID approved FL230 for air carrier X. I acknowledged. ZID called back and asked me to give air carrier X 13000' instead. I acknowledged. Up to this point I had not given air carrier X any higher than 10000'. ZID called right back again and asked me to give air carrier X 12000'. I acknowledged. At this point I gave air carrier X 13000'. I don't remember doing this, but the tape said I did. I gave air carrier the frequency change to ZID. Before I switched air carrier X, I noticed the traffic that ZID was trying to avoid at 14000'. Perhaps this is why I said 13000'. Had trouble with the frequency change over and became a problem with crossing traffic for them. ZID descended the other aircraft when it became apparent to them that X was climbing to 13000'. They ended up with the sep needed, 1000' and 6 mi, but apparently no thanks to me. I think that if I had just handed X off at 10000' and let the center worry about when they were going to get him up and the other ones down, there would have been no system deviation.

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Original NASA ASRS Text

Title: DEP CTLR ASSIGNED ACR X WRONG ALT AFTER TRACON ARTCC INTERFAC COORD.

Narrative: I WAS WORKING MODERATE TFC IN THE S PORTION OF CMH AIRSPACE. ACR X WAS A SW DEP TO THE W OFF CMH. AFTER CLBING HIM ABOVE AN OVERFLT AT 6000' WBND, I TURNED ACR X SW TO 230 DEGS AND 10000', THE TOP OF MY AIRSPACE. ZID HAD AN LTT Y INBND FROM THE SW, NEBND LEVEL AT 11000'. I KNEW THAT THE LTT AND ACR X WOULD LEVEL FOR SOME TIME IF I DIDN'T ASK FOR HIGHER FOR ACR X. I HAD PLENTY OF ROOM FOR THE CLB AND ACR X WAS STILL IN THE CLB. ZID APPROVED FL230 FOR ACR X. I ACKNOWLEDGED. ZID CALLED BACK AND ASKED ME TO GIVE ACR X 13000' INSTEAD. I ACKNOWLEDGED. UP TO THIS POINT I HAD NOT GIVEN ACR X ANY HIGHER THAN 10000'. ZID CALLED RIGHT BACK AGAIN AND ASKED ME TO GIVE ACR X 12000'. I ACKNOWLEDGED. AT THIS POINT I GAVE ACR X 13000'. I DON'T REMEMBER DOING THIS, BUT THE TAPE SAID I DID. I GAVE ACR THE FREQ CHANGE TO ZID. BEFORE I SWITCHED ACR X, I NOTICED THE TFC THAT ZID WAS TRYING TO AVOID AT 14000'. PERHAPS THIS IS WHY I SAID 13000'. HAD TROUBLE WITH THE FREQ CHANGE OVER AND BECAME A PROB WITH XING TFC FOR THEM. ZID DSNDED THE OTHER ACFT WHEN IT BECAME APPARENT TO THEM THAT X WAS CLBING TO 13000'. THEY ENDED UP WITH THE SEP NEEDED, 1000' AND 6 MI, BUT APPARENTLY NO THANKS TO ME. I THINK THAT IF I HAD JUST HANDED X OFF AT 10000' AND LET THE CENTER WORRY ABOUT WHEN THEY WERE GOING TO GET HIM UP AND THE OTHER ONES DOWN, THERE WOULD HAVE BEEN NO SYS DEVIATION.

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.