C210G without TCASII has traffic conflict requiring precautionary evasive action on descent to abe.

Attributes
ACN	436041
Time
Date	199904
Day	Fri
Local Time Of Day	1201 To 1800
Place
State Reference	NJ
Altitude	agl bound lower : 6000 agl single value : 39
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny.artcc tracon : abe.tracon
Operator	general aviation : personal
Make Model Name	Cessna 210 Centurion / Turbo Centurion 210C, 210D
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	descent : vacating altitude
Route In Use	arrival : vfr
Flight Plan	None
Aircraft 2
Controlling Facilities	artcc : zny.artcc
Operator	common carrier : air carrier
Make Model Name	ATR 72
Operating Under FAR Part	Part 121
Flight Phase	descent : vacating altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 260 flight time total : 1700 flight time type : 750
ASRS Report	436041
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe
Independent Detector	atc equipment : conflict alert atc equipment other atc equipment : 1
Resolutory Action	controller : issued new clearance flight crew : took precautionary avoidance action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 500 vertical : 500
Supplementary
Problem Areas	ATC Human Performance Airspace Structure
Primary Problem	ATC Human Performance

Narrative:

Descending VFR from 10500 ft, radar (nyc) advised 'traffic 11 O'clock, you should pass well behind him.' replied 'negative contact.' nyc handed me off to allentown approach control. Allentown asked if I had seen aircraft go by. I replied yes, that nyc had told me about same. Was much closer than either one of us (ATC or myself) wanted this to be. Suggest possibly holding descending VFR aircraft at safe altitude until any opposing traffic passes. Evasive action taken was a slight turn away.

Original NASA ASRS Text

Title: C210G WITHOUT TCASII HAS TFC CONFLICT REQUIRING PRECAUTIONARY EVASIVE ACTION ON DSCNT TO ABE.

Narrative: DSNDING VFR FROM 10500 FT, RADAR (NYC) ADVISED 'TFC 11 O'CLOCK, YOU SHOULD PASS WELL BEHIND HIM.' REPLIED 'NEGATIVE CONTACT.' NYC HANDED ME OFF TO ALLENTOWN APCH CTL. ALLENTOWN ASKED IF I HAD SEEN ACFT GO BY. I REPLIED YES, THAT NYC HAD TOLD ME ABOUT SAME. WAS MUCH CLOSER THAN EITHER ONE OF US (ATC OR MYSELF) WANTED THIS TO BE. SUGGEST POSSIBLY HOLDING DSNDING VFR ACFT AT SAFE ALT UNTIL ANY OPPOSING TFC PASSES. EVASIVE ACTION TAKEN WAS A SLIGHT TURN AWAY.

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.