Close proximity air carrier-large transport air carrier-medium large transport on approach to dtw.

Attributes
ACN	155627
Time
Date	199009
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : dtw
State Reference	MI
Altitude	msl bound lower : 3000 msl bound upper : 4000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dtw
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach landing : go around
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 270 flight time total : 17000 flight time type : 13000
ASRS Report	155627
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 0 vertical : 800
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Dtw conducting parallel approach to 21L (ILS) and 21R (VOR). Controller training in progress. Air carrier flight large transport on final approach to 21R descending to 3000' MSL assigned. Aircraft on ILS to 21L broken off approach and given right turn and climb to 3000' MSL. Aircraft on approach to 21L, an medium large transport, passed directly under aircraft on VOR approach to 21R at a 90 degree angle.

Original NASA ASRS Text

Title: CLOSE PROX ACR-LGT ACR-MLG ON APCH TO DTW.

Narrative: DTW CONDUCTING PARALLEL APCH TO 21L (ILS) AND 21R (VOR). CTLR TRNING IN PROGRESS. ACR FLT LGT ON FINAL APCH TO 21R DSNDING TO 3000' MSL ASSIGNED. ACFT ON ILS TO 21L BROKEN OFF APCH AND GIVEN RIGHT TURN AND CLB TO 3000' MSL. ACFT ON APCH TO 21L, AN MLG, PASSED DIRECTLY UNDER ACFT ON VOR APCH TO 21R AT A 90 DEG ANGLE.

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.