ZME controller experienced operational error at approximately FL350.

Attributes
ACN	608579
Time
Date	200402
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zme.artcc
State Reference	TN
Altitude	msl bound lower : 35000 msl bound upper : 36000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zme.artcc
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 135 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zme.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 17 controller time certified in position1 : 14
ASRS Report	608579
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	controller : issued new clearance
Consequence	faa : investigated
Miss Distance	horizontal : 17800 vertical : 1100
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I descended aircraft X from FL370 to FL280. A couple of mins later, the conflict alert continued with aircraft Y at FL350. I told aircraft X to stop descent. He was at about FL360. I turned aircraft Y to heading 270 degrees (about 70 degree turn). I turned aircraft X right 40 degrees. I descended aircraft Y to FL310. The closest proximity was 1100 ft and 2.8 mi. I was working about 18 aircraft with no assistance. I've been working traffic only part time for the past 3 yrs. I average about 2 days a week for traffic and 3 days a week in the office.

Original NASA ASRS Text

Title: ZME CTLR EXPERIENCED OPERROR AT APPROX FL350.

Narrative: I DSNDED ACFT X FROM FL370 TO FL280. A COUPLE OF MINS LATER, THE CONFLICT ALERT CONTINUED WITH ACFT Y AT FL350. I TOLD ACFT X TO STOP DSCNT. HE WAS AT ABOUT FL360. I TURNED ACFT Y TO HDG 270 DEGS (ABOUT 70 DEG TURN). I TURNED ACFT X R 40 DEGS. I DSNDED ACFT Y TO FL310. THE CLOSEST PROX WAS 1100 FT AND 2.8 MI. I WAS WORKING ABOUT 18 ACFT WITH NO ASSISTANCE. I'VE BEEN WORKING TFC ONLY PART TIME FOR THE PAST 3 YRS. I AVERAGE ABOUT 2 DAYS A WK FOR TFC AND 3 DAYS A WK IN THE OFFICE.

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.