Close encounter for cpr mdt and VFR small transport twin near hpn.

Attributes
ACN	149600
Time
Date	199006
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : hpn
State Reference	NY
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	Medium Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	approach : visual enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	cruise other
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : flight engineer
Experience	flight time last 90 days : 60 flight time total : 9400 flight time type : 1500
ASRS Report	149600
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 0 vertical : 750
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

While on radar vectors to the visibility approach to runway 34 at hpn, our position was on a right downwind approximately 5 mi to the east of hpn over the long island sound. We were at 3000' AGL, 180 KTS (assigned by ATC), in VFR conditions with 15 mi visibility. At this position I noticed an small transport Y at our 12 O'clock to 1 O'clock position heading north up the sound. No time to try to avoid. I picked up the microphone and asked ATC if he had the small transport Y that passed in front of us. He responded no, but before he unkeyed the microphone he said 'I just picked up the target off your left wing'. We were then asked if we had hpn in sight, we said yes, and were cleared for the visibility approach and landed. Contributing factors were a very busy controller at a peak time of the day for hpn, and also a VFR aircraft hugging the TCA floor, not in contact with ATC. Corrective actions. Keep IFR traffic 500-1000' above the TCA floor. Have more controllers working and watching during the peak times.

Original NASA ASRS Text

Title: CLOSE ENCOUNTER FOR CPR MDT AND VFR SMT TWIN NEAR HPN.

Narrative: WHILE ON RADAR VECTORS TO THE VIS APCH TO RWY 34 AT HPN, OUR POS WAS ON A R DOWNWIND APPROX 5 MI TO THE E OF HPN OVER THE LONG ISLAND SOUND. WE WERE AT 3000' AGL, 180 KTS (ASSIGNED BY ATC), IN VFR CONDITIONS WITH 15 MI VISIBILITY. AT THIS POS I NOTICED AN SMT Y AT OUR 12 O'CLOCK TO 1 O'CLOCK POS HDG N UP THE SOUND. NO TIME TO TRY TO AVOID. I PICKED UP THE MICROPHONE AND ASKED ATC IF HE HAD THE SMT Y THAT PASSED IN FRONT OF US. HE RESPONDED NO, BUT BEFORE HE UNKEYED THE MIKE HE SAID 'I JUST PICKED UP THE TARGET OFF YOUR L WING'. WE WERE THEN ASKED IF WE HAD HPN IN SIGHT, WE SAID YES, AND WERE CLRED FOR THE VIS APCH AND LANDED. CONTRIBUTING FACTORS WERE A VERY BUSY CTLR AT A PEAK TIME OF THE DAY FOR HPN, AND ALSO A VFR ACFT HUGGING THE TCA FLOOR, NOT IN CONTACT WITH ATC. CORRECTIVE ACTIONS. KEEP IFR TFC 500-1000' ABOVE THE TCA FLOOR. HAVE MORE CTLRS WORKING AND WATCHING DURING THE PEAK TIMES.

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.