BAE125 has less than standard separation with traffic in N90 airspace.

Attributes
ACN	306990
Time
Date	199506
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : cmk
State Reference	NY
Altitude	msl bound lower : 5700 msl bound upper : 6300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air taxi
Make Model Name	BAe 125 Series 1000
Operating Under FAR Part	Part 135
Navigation In Use	Other Other
Flight Phase	cruise other cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	cruise other
Person 1
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 3500 flight time type : 235
ASRS Report	306990
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 300 vertical : 1500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

While acting as first officer and PF on an unscheduled far 135 passenger flight, we were flying at 6000 ft MSL near cmk VOR en route to teb from fok, when we were issued traffic at our 2:30 O'clock and 2 mi at 6300 ft. I spotted the traffic approximately 15 seconds after ATC called it, and it was on approximately 30 degrees converging course and much less than a mi. I immediately entered a 30 degree left descending turn and ATC was informed of the altitude deviation. VFR/IFR traffic mix is a big problem in and around and under the ny class B. We were on an IFR flight plan, and due to our altitude, at 250 KIAS. The other traffic, cheyenne III, was probably at a very compatible airspeed. As statistics show, this is where most mid-air/near midairs occur (converging). In my opinion, the 3 most hazardous places I have encountered while flying IFR, with regard to VFR traffic are in and around and under the lax class B, the ny class B, and the stl class B.

Original NASA ASRS Text

Title: BAE125 HAS LTSS WITH TFC IN N90 AIRSPACE.

Narrative: WHILE ACTING AS FO AND PF ON AN UNSCHEDULED FAR 135 PAX FLT, WE WERE FLYING AT 6000 FT MSL NEAR CMK VOR ENRTE TO TEB FROM FOK, WHEN WE WERE ISSUED TFC AT OUR 2:30 O'CLOCK AND 2 MI AT 6300 FT. I SPOTTED THE TFC APPROX 15 SECONDS AFTER ATC CALLED IT, AND IT WAS ON APPROX 30 DEGS CONVERGING COURSE AND MUCH LESS THAN A MI. I IMMEDIATELY ENTERED A 30 DEG L DSNDING TURN AND ATC WAS INFORMED OF THE ALTDEV. VFR/IFR TFC MIX IS A BIG PROB IN AND AROUND AND UNDER THE NY CLASS B. WE WERE ON AN IFR FLT PLAN, AND DUE TO OUR ALT, AT 250 KIAS. THE OTHER TFC, CHEYENNE III, WAS PROBABLY AT A VERY COMPATIBLE AIRSPD. AS STATISTICS SHOW, THIS IS WHERE MOST MID-AIR/NEAR MIDAIRS OCCUR (CONVERGING). IN MY OPINION, THE 3 MOST HAZARDOUS PLACES I HAVE ENCOUNTERED WHILE FLYING IFR, WITH REGARD TO VFR TFC ARE IN AND AROUND AND UNDER THE LAX CLASS B, THE NY CLASS B, AND THE STL CLASS B.

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.