B727 nebound overtaking a C550 was turned right to avoid a conflict.

Attributes
ACN	555365
Time
Date	200207
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : iiu.vortac
State Reference	KY
Altitude	msl single value : 37000
Environment
Flight Conditions	IMC
Weather Elements	Turbulence
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zid.artcc
Operator	general aviation : corporate
Make Model Name	Citation II S2/Bravo
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : developmental
Experience	controller limited radar : 0.4 controller time certified in position2 : 5
ASRS Report	555365
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 12
ASRS Report	555162
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	atc equipment : conflict alert atc equipment other atc equipment : radar other controllera other controllerb other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Miss Distance	horizontal : 27000 vertical : 600
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X was turned 20 degrees to the right for traffic requiring emergency descent. This put the faster air carrier X behind the slower aircraft Y also at FL370, nebound. Air carrier X then turned to 40 degree, 90 degree, and 100 degree headings to go behind aircraft Y. Supplemental information from acn 555162: air carrier X was turned 20 degrees to miss an aircraft descending. Aircraft Y was nebound at FL370. Conflict alert activated between the 2 at FL370. Air carrier X additionally was turned to a 40 degree heading then to a 90 degree heading, then a 100 degree heading. Lost separation.

Original NASA ASRS Text

Title: B727 NEBOUND OVERTAKING A C550 WAS TURNED R TO AVOID A CONFLICT.

Narrative: ACR X WAS TURNED 20 DEGS TO THE R FOR TFC REQUIRING EMER DSCNT. THIS PUT THE FASTER ACR X BEHIND THE SLOWER ACFT Y ALSO AT FL370, NEBOUND. ACR X THEN TURNED TO 40 DEG, 90 DEG, AND 100 DEG HDGS TO GO BEHIND ACFT Y. SUPPLEMENTAL INFO FROM ACN 555162: ACR X WAS TURNED 20 DEGS TO MISS AN ACFT DSNDING. ACFT Y WAS NEBOUND AT FL370. CONFLICT ALERT ACTIVATED BTWN THE 2 AT FL370. ACR X ADDITIONALLY WAS TURNED TO A 40 DEG HDG THEN TO A 90 DEG HDG, THEN A 100 DEG HDG. LOST SEPARATION.

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.