IFR pilot at 11000 ft with D01 TRACON; experienced conflict as a result of an ATC operational error.

Attributes
ACN	715678
Time
Date	200610
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : den.airport
State Reference	CO
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : d01.tracon tower : anc.tower
Operator	general aviation : personal
Make Model Name	Small Aircraft Low Wing 2 Eng Retractable Gear
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : d01.tracon
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : initial
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 350 flight time total : 3000 flight time type : 1500
ASRS Report	715678
Events
Anomaly	conflict : airborne critical non adherence : required legal separation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 1500 vertical : 0
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was cruising at 11000 ft direct signe intersection in class B. I was advised of a VFR aircraft 500 ft below at 11 O'clock position. I idented the aircraft then saw a jet in my cockpit window. I deviated hard right and he appeared to be climbing. The director of the ATC facility called and said it was an operational error. Both aircraft were cleared to 11000 ft. He said it was a class a (severe) near miss. Both aircraft were as one for 2 sweeps of the radar; he advised the controller had been decertified.

Original NASA ASRS Text

Title: IFR PLT AT 11000 FT WITH D01 TRACON; EXPERIENCED CONFLICT AS A RESULT OF AN ATC OPERROR.

Narrative: I WAS CRUISING AT 11000 FT DIRECT SIGNE INTXN IN CLASS B. I WAS ADVISED OF A VFR ACFT 500 FT BELOW AT 11 O'CLOCK POS. I IDENTED THE ACFT THEN SAW A JET IN MY COCKPIT WINDOW. I DEVIATED HARD R AND HE APPEARED TO BE CLBING. THE DIRECTOR OF THE ATC FACILITY CALLED AND SAID IT WAS AN OPERROR. BOTH ACFT WERE CLRED TO 11000 FT. HE SAID IT WAS A CLASS A (SEVERE) NEAR MISS. BOTH ACFT WERE AS ONE FOR 2 SWEEPS OF THE RADAR; HE ADVISED THE CTLR HAD BEEN DECERTIFIED.

Data retrieved from NASA's ASRS site as of January 2009 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.