ARTCC radar controller had communication problem with a climbing HS25. Contact established after the aircraft conflicted with traffic at cruise altitude.

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Attributes
ACN	408891
Time
Date	199807
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : pcz
State Reference	WI
Altitude	msl bound lower : 19000 msl bound upper : 20000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zmp
Operator	general aviation : corporate
Make Model Name	BAe 125 Series 800
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 16
ASRS Report	408891
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	atc equipment other atc equipment : unspecified other controllera other flight crewa
Resolutory Action	aircraft : equipment problem dissipated controller : issued new clearance none taken : unable
Consequence	Other
Miss Distance	horizontal : 28200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation Operational Error

Narrative:

The HS25 was climbing to FL230 and overflt at FL200. The HS25 was issued two clrncs to stop at FL190 and never acknowledged. Then was issued a clearance to turn 30 degrees right and did not acknowledge. Pilot issued second 30 degree right turn. Pilot acknowledged with comment of 'I have traffic on TCASII.'

Original NASA ASRS Text

Title: ARTCC RADAR CTLR HAD COM PROB WITH A CLBING HS25. CONTACT ESTABLISHED AFTER THE ACFT CONFLICTED WITH TFC AT CRUISE ALT.

Narrative: THE HS25 WAS CLBING TO FL230 AND OVERFLT AT FL200. THE HS25 WAS ISSUED TWO CLRNCS TO STOP AT FL190 AND NEVER ACKNOWLEDGED. THEN WAS ISSUED A CLRNC TO TURN 30 DEGS R AND DID NOT ACKNOWLEDGE. PLT ISSUED SECOND 30 DEG R TURN. PLT ACKNOWLEDGED WITH COMMENT OF 'I HAVE TFC ON TCASII.'

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.