Narrative:

I was working one sector combined with two other sectors. I had an E135 inbound to a class B airport. The E135 had a crossing on the arrival at 120. Then I had a C525 depart a nearby class C. Approach called to get higher; so we released 110. Upon radio communications I noticed the C525 was climbing extremely well. I climbed the C525 to FL230. I knew he was going to be close to the E135 so I kept running out the leader lines. After a couple seconds I turned the C525 15 degrees left. I noticed the C525 was still going to hit the J ball so I had them report leaving 150 and it was still a bit late. After the omic pulled all the information it was a non occurrence. Recommendation to myself is to use a little more common sense. I knew it was going to be close. I also knew I had time to watch it so I let my control abilities down. [I] can't put myself in the 'I can watch it' situations.

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Original NASA ASRS Text

Title: Enroute Controller described a near loss of separation event when he failed to timely act and simply 'watched' too long as the conflict developed.

Narrative: I was working one sector combined with two other sectors. I had an E135 inbound to a Class B airport. The E135 had a crossing on the arrival at 120. Then I had a C525 depart a nearby Class C. Approach called to get higher; so we released 110. Upon radio communications I noticed the C525 was climbing extremely well. I climbed the C525 to FL230. I knew he was going to be close to the E135 so I kept running out the leader lines. After a couple seconds I turned the C525 15 degrees left. I noticed the C525 was still going to hit the J ball so I had them report leaving 150 and it was still a bit late. After the OMIC pulled all the information it was a non occurrence. Recommendation to myself is to use a little more common sense. I knew it was going to be close. I also knew I had time to watch it so I let my control abilities down. [I] can't put myself in the 'I can watch it' situations.

Data retrieved from NASA's ASRS site as of April 2012 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.