C650 crew and unknown aircraft had near midair collision in class B N90 airspace.

Attributes
ACN	418440
Time
Date	199810
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : teb airport : teb
State Reference	NJ
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	general aviation : corporate
Make Model Name	Citation III, VI, VII
Flight Phase	descent other
Route In Use	approach : visual enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument
Experience	flight time last 90 days : 100 flight time total : 8000 flight time type : 100
ASRS Report	418440
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : nmac
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action other
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance

Narrative:

While on a vector for a visual arrival to teb, new york departure descended us to 3000 ft MSL on a vector, then cleared us to wanes intersection. Upon arrival at 3000 ft MSL, our TCASII alerted an RA descend and traffic alert. We immediately descended to 2600 ft MSL as TCASII indicates and traffic alert eliminates. We never saw traffic. We advised ARTCC of our RA descent and climbed back to 3000 ft MSL. He said 'there were a lot of wkend flyers out today' and called several other VFR traffic.

Original NASA ASRS Text

Title: C650 CREW AND UNKNOWN ACFT HAD NMAC IN CLASS B N90 AIRSPACE.

Narrative: WHILE ON A VECTOR FOR A VISUAL ARR TO TEB, NEW YORK DEP DSNDED US TO 3000 FT MSL ON A VECTOR, THEN CLRED US TO WANES INTXN. UPON ARR AT 3000 FT MSL, OUR TCASII ALERTED AN RA DSND AND TFC ALERT. WE IMMEDIATELY DSNDED TO 2600 FT MSL AS TCASII INDICATES AND TFC ALERT ELIMINATES. WE NEVER SAW TFC. WE ADVISED ARTCC OF OUR RA DSCNT AND CLBED BACK TO 3000 FT MSL. HE SAID 'THERE WERE A LOT OF WKEND FLYERS OUT TODAY' AND CALLED SEVERAL OTHER VFR TFC.

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.