Narrative:

I was working the r-side at 2 sectors combined at 1 position. I had previously been at the d-side, and shortly after I relieved the radar controller I myself got a d-side. There was considerable meteorological activity in the area, but I can't say that WX was much of a factor in this incident at all. I had 10 aircraft on frequency, and about 3 of them were experiencing very bumpy rides and requesting ride reports and/or altitude changes. The C650 checked on at FL410 and shortly thereafter requested lower. The aircraft was landing at an atlanta satellite airport and also needed a routing change. Knowing I had traffic at both FL350 and FL390 (L1011), I descended the C650 to FL370 on his present heading and cleared the plane to join the arrival upon reaching FL370. As I thought the L1011 was routed via vxv-J99-iiu, this clearance would have ensured separation. As the L1011 reached vxv and continued wbound on J46, the conflict alert activated and I realized the plane's true route, vxv-J46- bna. I immediately issued sharp right turns to both aircraft and requested a report reaching FL370 from the C650 as soon as possible. But, as they say around here, 'my actions were untimely and separation was lost.' stupid deal, in short. What bothers me most about it is that not only did I see the traffic, but was sure I had them separated. MEA culpa.

Related reports:

Google
 

Original NASA ASRS Text

Title: ARTCC RADAR CTLR DSNDED A C650 THROUGH THE ALT OF AN L1011 WITH LTSS. RPTR ERROR ADMITTED.

Narrative: I WAS WORKING THE R-SIDE AT 2 SECTORS COMBINED AT 1 POS. I HAD PREVIOUSLY BEEN AT THE D-SIDE, AND SHORTLY AFTER I RELIEVED THE RADAR CTLR I MYSELF GOT A D-SIDE. THERE WAS CONSIDERABLE METEOROLOGICAL ACTIVITY IN THE AREA, BUT I CAN'T SAY THAT WX WAS MUCH OF A FACTOR IN THIS INCIDENT AT ALL. I HAD 10 ACFT ON FREQ, AND ABOUT 3 OF THEM WERE EXPERIENCING VERY BUMPY RIDES AND REQUESTING RIDE RPTS AND/OR ALT CHANGES. THE C650 CHKED ON AT FL410 AND SHORTLY THEREAFTER REQUESTED LOWER. THE ACFT WAS LNDG AT AN ATLANTA SATELLITE ARPT AND ALSO NEEDED A ROUTING CHANGE. KNOWING I HAD TFC AT BOTH FL350 AND FL390 (L1011), I DSNDED THE C650 TO FL370 ON HIS PRESENT HDG AND CLRED THE PLANE TO JOIN THE ARR UPON REACHING FL370. AS I THOUGHT THE L1011 WAS ROUTED VIA VXV-J99-IIU, THIS CLRNC WOULD HAVE ENSURED SEPARATION. AS THE L1011 REACHED VXV AND CONTINUED WBOUND ON J46, THE CONFLICT ALERT ACTIVATED AND I REALIZED THE PLANE'S TRUE RTE, VXV-J46- BNA. I IMMEDIATELY ISSUED SHARP R TURNS TO BOTH ACFT AND REQUESTED A RPT REACHING FL370 FROM THE C650 ASAP. BUT, AS THEY SAY AROUND HERE, 'MY ACTIONS WERE UNTIMELY AND SEPARATION WAS LOST.' STUPID DEAL, IN SHORT. WHAT BOTHERS ME MOST ABOUT IT IS THAT NOT ONLY DID I SEE THE TFC, BUT WAS SURE I HAD THEM SEPARATED. MEA CULPA.

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.