A BAE125 flight crew received 3 TCASII RA's between 3000-5000 ft MSL on descent into teb.

Attributes
ACN	443927
Time
Date	199907
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : teb.airport
State Reference	NJ
Altitude	msl bound lower : 2000 msl bound upper : 5000
Environment
Flight Conditions	IMC
Weather Elements	Thunderstorm
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	general aviation : corporate
Make Model Name	HS 125 Series 1-600
Operating Under FAR Part	Part 91
Navigation In Use	ils localizer & glide slope : 19 other vortac
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : n90.tracon
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : commercial pilot : instrument pilot : multi engine pilot : atp
Experience	flight time last 90 days : 200 flight time total : 3800 flight time type : 500
ASRS Report	443927
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	conflict : nmac
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action
Supplementary
Problem Areas	Airport
Primary Problem	Airport

Narrative:

We began to receive numerous and constant TA's from our TCASII. At 3000-5000 ft, received an RA to climb, which I did to approximately 300 ft above my assigned altitude. My first officer spotted the aircraft approximately 100 ft below and 100 ft horizontal. The first officer attempted to contact ATC, but was unable until ATC called us and he advised ATC of our RA. As I started to return to assigned altitude, received a second RA to climb, which I did to approximately 500 ft above assigned. We never spotted the aircraft. As we leveled, we received a third RA to descend, which we did by 500 ft. Again we did not spot the aircraft and could not contact ATC until they contacted us and we climbed to altitude and were cleared for the approach.

Original NASA ASRS Text

Title: A BAE125 FLC RECEIVED 3 TCASII RA'S BTWN 3000-5000 FT MSL ON DSCNT INTO TEB.

Narrative: WE BEGAN TO RECEIVE NUMEROUS AND CONSTANT TA'S FROM OUR TCASII. AT 3000-5000 FT, RECEIVED AN RA TO CLB, WHICH I DID TO APPROX 300 FT ABOVE MY ASSIGNED ALT. MY FO SPOTTED THE ACFT APPROX 100 FT BELOW AND 100 FT HORIZ. THE FO ATTEMPTED TO CONTACT ATC, BUT WAS UNABLE UNTIL ATC CALLED US AND HE ADVISED ATC OF OUR RA. AS I STARTED TO RETURN TO ASSIGNED ALT, RECEIVED A SECOND RA TO CLB, WHICH I DID TO APPROX 500 FT ABOVE ASSIGNED. WE NEVER SPOTTED THE ACFT. AS WE LEVELED, WE RECEIVED A THIRD RA TO DSND, WHICH WE DID BY 500 FT. AGAIN WE DID NOT SPOT THE ACFT AND COULD NOT CONTACT ATC UNTIL THEY CONTACTED US AND WE CLBED TO ALT AND WERE CLRED FOR THE APCH.

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.