A B757 flight crew experiences a TCASII RA while descending.

Attributes
ACN	520660
Time
Date	200108
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cvg.airport
State Reference	KY
Altitude	msl single value : 7000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d21.tracon
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Flight Phase	descent : approach
Route In Use	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : cvg.tracon
Operator	general aviation : corporate
Make Model Name	Dassault-Breguet Undifferentiated or Other Model
Flight Phase	descent : intermediate altitude descent : approach
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 : 200 flight time total : 10000 flight time type : 4000
ASRS Report	520660
Events
Anomaly	other anomaly other
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

Scheduled flight from bwi to cvg. We were on radar vectors to runway 18L at cvg. Level 7000 ft at 170 KTS. Approach gave us a heading change of 10 degrees right (010 degrees). At same time we got 'traffic' on TCASII at 10'clock position, 500 ft above us, descending, moving right to left. Approach said further right to 050 degrees as we got an RA to descend at about 1400 FPM. We followed and advised ATC we were leaving 7000 ft. After 'clear of conflict' we were at 6400 ft, heading around 050 degrees. ATC directed 'go to 6000 ft and back left to 270 degrees'. Rest of flight uneventful. Subsequent ATC conversation indicated other aircraft was a falcon. We never saw our RA traffic visually as it was quite hazy.

Original NASA ASRS Text

Title: A B757 FLT CREW EXPERIENCES A TCASII RA WHILE DSNDING.

Narrative: SCHEDULED FLT FROM BWI TO CVG. WE WERE ON RADAR VECTORS TO RWY 18L AT CVG. LEVEL 7000 FT AT 170 KTS. APCH GAVE US A HDG CHANGE OF 10 DEGS R (010 DEGS). AT SAME TIME WE GOT 'TFC' ON TCASII AT 10'CLOCK POS, 500 FT ABOVE US, DSNDING, MOVING R TO L. APCH SAID FURTHER R TO 050 DEGS AS WE GOT AN RA TO DSND AT ABOUT 1400 FPM. WE FOLLOWED AND ADVISED ATC WE WERE LEAVING 7000 FT. AFTER 'CLR OF CONFLICT' WE WERE AT 6400 FT, HDG AROUND 050 DEGS. ATC DIRECTED 'GO TO 6000 FT AND BACK L TO 270 DEGS'. REST OF FLT UNEVENTFUL. SUBSEQUENT ATC CONVERSATION INDICATED OTHER ACFT WAS A FALCON. WE NEVER SAW OUR RA TFC VISUALLY AS IT WAS QUITE HAZY.

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.