BE400 flight crew has an near midair collision in dtw airspace.

Attributes
ACN	700578
Time
Date	200606
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dtw.airport
State Reference	MI
Altitude	msl single value : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d21.tracon
Operator	general aviation : corporate
Make Model Name	Beechjet 400
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : d21.tracon
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 150 flight time total : 5950 flight time type : 3000
ASRS Report	700578
Person 2
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 0 vertical : 200
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Ambiguous

Narrative:

During descent into dtw we were cleared to 6000 ft by detroit approach. We were given a traffic report at 11 O'clock position and we advised ATC we had traffic on TCAS and visually looking. I then saw traffic visually. There appeared to be a traffic conversion; so I shallowed my descent; then we were given an RA climb from our TCAS and we complied. We announced to ATC that we were climbing to avoid traffic and the traffic appeared to pass 200-300 ft below us. We advised ATC that we were clear of the conflict and continued our descent to 6000 ft.

Original NASA ASRS Text

Title: BE400 FLT CREW HAS AN NMAC IN DTW AIRSPACE.

Narrative: DURING DSCNT INTO DTW WE WERE CLRED TO 6000 FT BY DETROIT APCH. WE WERE GIVEN A TFC RPT AT 11 O'CLOCK POS AND WE ADVISED ATC WE HAD TFC ON TCAS AND VISUALLY LOOKING. I THEN SAW TFC VISUALLY. THERE APPEARED TO BE A TFC CONVERSION; SO I SHALLOWED MY DSCNT; THEN WE WERE GIVEN AN RA CLB FROM OUR TCAS AND WE COMPLIED. WE ANNOUNCED TO ATC THAT WE WERE CLBING TO AVOID TFC AND THE TFC APPEARED TO PASS 200-300 FT BELOW US. WE ADVISED ATC THAT WE WERE CLR OF THE CONFLICT AND CONTINUED OUR DSCNT TO 6000 FT.

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.