BE90 has near midair collision with C172 during visual approach to bfi.

Attributes
ACN	683662
Time
Date	200601
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bfi.airport
State Reference	WA
Altitude	msl single value : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : bfi.tower
Operator	general aviation : corporate
Make Model Name	King Air C90 E90
Operating Under FAR Part	Part 135
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : bfi.tower
Operator	general aviation : instructional
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	VFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 98 flight time total : 11712 flight time type : 642
ASRS Report	683662
Person 2
Affiliation	other
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Miss Distance	horizontal : 15 vertical : 50
Supplementary
Problem Areas	Airspace Structure
Primary Problem	Airspace Structure

Narrative:

I was on an IFR flight plan from olm to bfi. I was vectored for the visual approach runway 13R. While following the GS and localizer in VMC; I encountered a cessna in the pattern west of runway 13R making right traffic for runway 13L. I received no report of traffic from ATC. I caught the cessna at very close range off my right wing. There was no opportunity to take evasive action and continued on for landing without further incident.

Original NASA ASRS Text

Title: BE90 HAS NMAC WITH C172 DURING VISUAL APCH TO BFI.

Narrative: I WAS ON AN IFR FLT PLAN FROM OLM TO BFI. I WAS VECTORED FOR THE VISUAL APCH RWY 13R. WHILE FOLLOWING THE GS AND LOC IN VMC; I ENCOUNTERED A CESSNA IN THE PATTERN W OF RWY 13R MAKING R TFC FOR RWY 13L. I RECEIVED NO RPT OF TFC FROM ATC. I CAUGHT THE CESSNA AT VERY CLOSE RANGE OFF MY R WING. THERE WAS NO OPPORTUNITY TO TAKE EVASIVE ACTION AND CONTINUED ON FOR LNDG WITHOUT FURTHER INCIDENT.

Data retrieved from NASA's ASRS site as of January 2009 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.