Airborne potential conflict created when a B757 and a learjet 25 were deviating around the same thunderstorm and refused turns by ARTCC controller for separation and TCASII RA put aircraft in conflict. 1 aircraft deviated into another controller's airspace causing that controller to move his aircraft by turning and descending it.

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Attributes
ACN	542615
Time
Date	200203
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ilm.airport
State Reference	NC
Altitude	msl single value : 37000
Environment
Flight Conditions	IMC
Weather Elements	Rain Thunderstorm Turbulence
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : zdc.artcc
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zdc.artcc
Operator	general aviation : corporate
Make Model Name	Learjet 25
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller limited radar : 3 controller military : 3 controller non radar : 5 controller radar : 15 controller supervisory : 1 controller time certified in position1 : 5
ASRS Report	542615
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller military : 3 controller radar : 19
ASRS Report	542614
Events
Anomaly	conflict : airborne critical inflight encounter : weather non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : radar aircraft equipment : tcas other controllera other controllerb
Resolutory Action	controller : separated traffic flight crew : took precautionary avoidance action
Miss Distance	horizontal : 24000 vertical : 1000
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance Weather
Primary Problem	Weather

Narrative:

Aircraft were deviating around storm which put them in each others path. Turns were refused because of WX, vertical separation was used as soon as possible but RA put aircraft in conflict. Supplemental information from acn 542614: aircraft deviating into my sector in conflict with another aircraft in my sector at same altitude. Deviating aircraft unable to turn. I was unable to change altitude or aircraft under my control because of opposite direction traffic. I vectored aircraft under my control and had to descend it so it would not hit deviating aircraft.

Original NASA ASRS Text

Title: AIRBORNE POTENTIAL CONFLICT CREATED WHEN A B757 AND A LEARJET 25 WERE DEVIATING AROUND THE SAME TSTM AND REFUSED TURNS BY ARTCC CTLR FOR SEPARATION AND TCASII RA PUT ACFT IN CONFLICT. 1 ACFT DEVIATED INTO ANOTHER CTLR'S AIRSPACE CAUSING THAT CTLR TO MOVE HIS ACFT BY TURNING AND DSNDING IT.

Narrative: ACFT WERE DEVIATING AROUND STORM WHICH PUT THEM IN EACH OTHERS PATH. TURNS WERE REFUSED BECAUSE OF WX, VERT SEPARATION WAS USED ASAP BUT RA PUT ACFT IN CONFLICT. SUPPLEMENTAL INFO FROM ACN 542614: ACFT DEVIATING INTO MY SECTOR IN CONFLICT WITH ANOTHER ACFT IN MY SECTOR AT SAME ALT. DEVIATING ACFT UNABLE TO TURN. I WAS UNABLE TO CHANGE ALT OR ACFT UNDER MY CTL BECAUSE OF OPPOSITE DIRECTION TFC. I VECTORED ACFT UNDER MY CTL AND HAD TO DSND IT SO IT WOULD NOT HIT DEVIATING ACFT.

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.