Captain of air carrier mdt aircraft took evasive action during a visual approach in response to a TC...

Attributes
ACN	232275
Time
Date	199301
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : dtw
State Reference	MI
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : dtw
Operator	common carrier : air carrier
Make Model Name	Medium Transport, High Wing, 2 Turboprop Eng
Navigation In Use	Other Other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 70 flight time total : 1600 flight time type : 70
ASRS Report	232275
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 3000 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On the night of jan/wed/93, at approximately XA25, flight was cleared for a visual approach to runway 21R at dtw. The aircraft to follow and the airport was in sight when we were handed off to dtw tower and cleared to land. On approximately a 5-7 mi final, our TCASII issued a traffic warning. As PNF, I began to scan to locate the traffic. The warning became an RA within approximately 3 seconds. The captain complied with the RA and descended the required 1500 FPM. The TCASII positioned the traffic 100 ft above and approximately 1/2 mi to our left. The tower controller then gave us a right turn to reintercept the localizer which the captain interpreted to be a right 360 degree turn to separate from traffic, before the right turn could be confirmed by the controller we were revectored for the visual approach to 21R without further incident. Factors: congested airspace. Congested radio frequency. TCASII response to traffic in a congested area. Compliance to TCASII RA in visual conditions without aircraft in sight. Multiple visual approach clrncs to parallel runways.

Original NASA ASRS Text

Title: CAPT OF ACR MDT ACFT TOOK EVASIVE ACTION DURING A VISUAL APCH IN RESPONSE TO A TCASII RA.

Narrative: ON THE NIGHT OF JAN/WED/93, AT APPROX XA25, FLT WAS CLRED FOR A VISUAL APCH TO RWY 21R AT DTW. THE ACFT TO FOLLOW AND THE ARPT WAS IN SIGHT WHEN WE WERE HANDED OFF TO DTW TWR AND CLRED TO LAND. ON APPROX A 5-7 MI FINAL, OUR TCASII ISSUED A TFC WARNING. AS PNF, I BEGAN TO SCAN TO LOCATE THE TFC. THE WARNING BECAME AN RA WITHIN APPROX 3 SECONDS. THE CAPT COMPLIED WITH THE RA AND DSNDED THE REQUIRED 1500 FPM. THE TCASII POSITIONED THE TFC 100 FT ABOVE AND APPROX 1/2 MI TO OUR L. THE TWR CTLR THEN GAVE US A R TURN TO REINTERCEPT THE LOC WHICH THE CAPT INTERPRETED TO BE A R 360 DEG TURN TO SEPARATE FROM TFC, BEFORE THE R TURN COULD BE CONFIRMED BY THE CTLR WE WERE REVECTORED FOR THE VISUAL APCH TO 21R WITHOUT FURTHER INCIDENT. FACTORS: CONGESTED AIRSPACE. CONGESTED RADIO FREQ. TCASII RESPONSE TO TFC IN A CONGESTED AREA. COMPLIANCE TO TCASII RA IN VISUAL CONDITIONS WITHOUT ACFT IN SIGHT. MULTIPLE VISUAL APCH CLRNCS TO PARALLEL RWYS.

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.

Captain of air carrier mdt aircraft took evasive action during a visual approach in response to a TCASII RA.