Near midair collision near rbv VOR.

Attributes
ACN	479498
Time
Date	200007
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : rbv.vortac
State Reference	NJ
Altitude	msl single value : 8000
Environment
Flight Conditions	IMC
Aircraft 1
Controlling Facilities	tracon : n90.tracon tower : las.tower
Operator	common carrier : air carrier
Make Model Name	DC-9 30
Operating Under FAR Part	Part 121
Route In Use	arrival star : eno-rbv1
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : vacating altitude
Route In Use	arrival : vfr
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 7000 flight time type : 3000
ASRS Report	479498
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : multi engine pilot : instrument
Events
Anomaly	conflict : nmac inflight encounter : vfr in imc non adherence : far non adherence : published procedure
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	controller : issued advisory flight crew : took evasive action
Miss Distance	horizontal : 0 vertical : 200
Supplementary
Problem Areas	Flight Crew Human Performance Weather
Primary Problem	Flight Crew Human Performance

Narrative:

While on the eno-RBV1 arrival into ewr, my flight encountered an near midair collision situation. At approximately XA15, aircraft X was on the 238 degree radial inbound to rbv VOR approximately 3 mi from the station at 8000 ft. New york approach issued a TA for VFR traffic at 11 O'clock position and 6 mi, 8700 ft. We did not have traffic in sight as we were right in bases of broken cloud layer. Traffic appeared on TCASII followed by a 'traffic, traffic' advisory. At approximately 1 mi at our 11 O'clock position, the VFR traffic started a rapid descent, through the cloud layer. We received an RA to 'descend, descend now!' we complied and the VFR aircraft flew directly over us and missed us by 200 ft. We advised ATC of our evasive action. He replied 'roger, that VFR traffic just started descending.' we advised ATC that the VFR traffic was descending through the cloud layer IFR.

Original NASA ASRS Text

Title: NMAC NEAR RBV VOR.

Narrative: WHILE ON THE ENO-RBV1 ARR INTO EWR, MY FLT ENCOUNTERED AN NMAC SIT. AT APPROX XA15, ACFT X WAS ON THE 238 DEG RADIAL INBOUND TO RBV VOR APPROX 3 MI FROM THE STATION AT 8000 FT. NEW YORK APCH ISSUED A TA FOR VFR TFC AT 11 O'CLOCK POS AND 6 MI, 8700 FT. WE DID NOT HAVE TFC IN SIGHT AS WE WERE RIGHT IN BASES OF BROKEN CLOUD LAYER. TFC APPEARED ON TCASII FOLLOWED BY A 'TFC, TFC' ADVISORY. AT APPROX 1 MI AT OUR 11 O'CLOCK POS, THE VFR TFC STARTED A RAPID DSCNT, THROUGH THE CLOUD LAYER. WE RECEIVED AN RA TO 'DSND, DSND NOW!' WE COMPLIED AND THE VFR ACFT FLEW DIRECTLY OVER US AND MISSED US BY 200 FT. WE ADVISED ATC OF OUR EVASIVE ACTION. HE REPLIED 'ROGER, THAT VFR TFC JUST STARTED DSNDING.' WE ADVISED ATC THAT THE VFR TFC WAS DSNDING THROUGH THE CLOUD LAYER IFR.

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.