ZTL radar associate controller reported operational error with climbing and descending aircraft at a...

Attributes
ACN	625525
Time
Date	200407
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : gso.vortac
State Reference	NC
Altitude	msl bound lower : 19000 msl bound upper : 20000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : ztl.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : ztl.artcc
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : handoff position
Qualification	controller : radar pilot : private pilot : instrument
Experience	controller radar : 20 controller time certified in position1 : 15 flight time total : 1000
ASRS Report	625525
Person 2
Affiliation	government : faa
Function	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment : conflict alert
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 12600 vertical : 100
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Aircraft #1 on SID, which includes 70 degree right turn, was climbing slow from rdu. Aircraft #2 on majic arrival descending. Aircraft #1's right turn at a lower altitude, in conjunction with aircraft #2's late descent clearance due to traffic, created situation. The fix was azell where the turn is the 'fan' point on the SID. After situation noticed, turns would have been ineffective. Stopping climb and descent would have been ineffective. Both aircraft were instructed to increase climb and descent rates. They did. This section of the SID should not go over azell but to the north from rdu. The r-side performed masterfully to alleviate a horrible situation, but not well enough to meet separation standards. The conflict alert did activate, but too late due to the large turn in the SID.

Original NASA ASRS Text

Title: ZTL RADAR ASSOCIATE CTLR RPTED OPERROR WITH CLBING AND DSNDING ACFT AT APPROX FL200.

Narrative: ACFT #1 ON SID, WHICH INCLUDES 70 DEG R TURN, WAS CLBING SLOW FROM RDU. ACFT #2 ON MAJIC ARR DSNDING. ACFT #1'S R TURN AT A LOWER ALT, IN CONJUNCTION WITH ACFT #2'S LATE DSCNT CLRNC DUE TO TFC, CREATED SIT. THE FIX WAS AZELL WHERE THE TURN IS THE 'FAN' POINT ON THE SID. AFTER SIT NOTICED, TURNS WOULD HAVE BEEN INEFFECTIVE. STOPPING CLB AND DSCNT WOULD HAVE BEEN INEFFECTIVE. BOTH ACFT WERE INSTRUCTED TO INCREASE CLB AND DSCNT RATES. THEY DID. THIS SECTION OF THE SID SHOULD NOT GO OVER AZELL BUT TO THE N FROM RDU. THE R-SIDE PERFORMED MASTERFULLY TO ALLEVIATE A HORRIBLE SIT, BUT NOT WELL ENOUGH TO MEET SEPARATION STANDARDS. THE CONFLICT ALERT DID ACTIVATE, BUT TOO LATE DUE TO THE LARGE TURN IN THE SID.

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.

ZTL radar associate controller reported operational error with climbing and descending aircraft at approximately FL200.