ZBW controller experienced conflict at 7000 ft between IFR aircraft and VFR traffic in IMC condition...

Attributes
ACN	622105
Time
Date	200406
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : een.vortac
State Reference	NH
Altitude	msl bound lower : 7000 msl bound upper : 7500
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zbw.artcc
Operator	general aviation : personal
Make Model Name	PA-46 Malibu
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zbw.artcc
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise : level
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 16.5 controller time certified in position1 : 1 controller time certified in position2 : 7
ASRS Report	622105
Person 2
Function	flight crew : single pilot
Events
Anomaly	conflict : airborne less severe inflight encounter : vfr in imc non adherence : far other spatial deviation
Independent Detector	atc equipment other atc equipment : radar tracking & mode c other controllera
Resolutory Action	controller : issued advisory flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	vertical : 200
Supplementary
Problem Areas	Flight Crew Human Performance Weather
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was working radar position at ZBW. I was working aircraft X (PA46T) en route to ddh. Aircraft X was at 7000 ft. I called out traffic to him of a VFR (untracked target) 9 O'clock position, 6 mi northbound, altitude indicates 7500 ft unverified. I was not talking to the VFR aircraft. Since the altitude indicated 7500 ft. I did not feel that a safety alert needed to be issued. Aircraft X reported after a few mins that he had to take evasive action because he thought that the aircraft was at approximately 7200 ft and was operating in complete IMC conditions. I alerted the operations supervisor and asked the next controller to monitor the target and see where it landed.

Original NASA ASRS Text

Title: ZBW CTLR EXPERIENCED CONFLICT AT 7000 FT BTWN IFR ACFT AND VFR TFC IN IMC CONDITIONS.

Narrative: I WAS WORKING RADAR POS AT ZBW. I WAS WORKING ACFT X (PA46T) ENRTE TO DDH. ACFT X WAS AT 7000 FT. I CALLED OUT TFC TO HIM OF A VFR (UNTRACKED TARGET) 9 O'CLOCK POS, 6 MI NBOUND, ALT INDICATES 7500 FT UNVERIFIED. I WAS NOT TALKING TO THE VFR ACFT. SINCE THE ALT INDICATED 7500 FT. I DID NOT FEEL THAT A SAFETY ALERT NEEDED TO BE ISSUED. ACFT X RPTED AFTER A FEW MINS THAT HE HAD TO TAKE EVASIVE ACTION BECAUSE HE THOUGHT THAT THE ACFT WAS AT APPROX 7200 FT AND WAS OPERATING IN COMPLETE IMC CONDITIONS. I ALERTED THE OPS SUPVR AND ASKED THE NEXT CTLR TO MONITOR THE TARGET AND SEE WHERE IT LANDED.

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.

ZBW controller experienced conflict at 7000 ft between IFR aircraft and VFR traffic in IMC conditions.