Near midair collision in class B airspace.

Attributes
ACN	529413
Time
Date	200111
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dtw.airport
State Reference	MI
Altitude	agl single value : 1200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : dtw.tower
Operator	common carrier : air carrier
Make Model Name	DC-9 50
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 150 flight time total : 12600 flight time type : 7000
ASRS Report	529413
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	airspace violation : entry altitude deviation : excursion from assigned altitude conflict : nmac non adherence : far
Independent Detector	aircraft equipment : tcas
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 0 vertical : 400
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On final approach to dtw runway 22L at approximately 1200 ft AGL at final approach speed and landing confign, TCASII displayed target 500 ft below and less than 1/2 mi. TCASII issued RA commanding +3000 FPM climb. TCASII RA complied with. Other aircraft type unknown and apparently not in contact with dtw tower.

Original NASA ASRS Text

Title: NMAC IN CLASS B AIRSPACE.

Narrative: ON FINAL APCH TO DTW RWY 22L AT APPROX 1200 FT AGL AT FINAL APCH SPD AND LNDG CONFIGN, TCASII DISPLAYED TARGET 500 FT BELOW AND LESS THAN 1/2 MI. TCASII ISSUED RA COMMANDING +3000 FPM CLB. TCASII RA COMPLIED WITH. OTHER ACFT TYPE UNKNOWN AND APPARENTLY NOT IN CONTACT WITH DTW TWR.

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.