B737-400 crew had an near midair collision with a C208 in bfi class D airspace.

Attributes
ACN	604352
Time
Date	200401
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bfi.airport
State Reference	WA
Altitude	msl single value : 1200
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tower : bfi.tower
Operator	general aviation : corporate
Make Model Name	B737-400
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : bfi.tower
Operator	general aviation : corporate
Make Model Name	B737-400
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : multi engine pilot : atp
Experience	flight time last 90 days : 98 flight time total : 6550 flight time type : 1153
ASRS Report	604352
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 65 flight time total : 3490 flight time type : 1880
ASRS Report	604546
Events
Anomaly	conflict : nmac non adherence : far non adherence : published procedure non adherence : required legal separation other spatial deviation
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb other other : 3
Resolutory Action	controller : issued advisory flight crew : took evasive action none taken : detected after the fact other
Miss Distance	horizontal : 100 vertical : 100
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Near miss. We were cleared harbor visual to runway 13R and entered elliott bay below 2000 ft. Boeing tower reported 'traffic at 11 O'clock position to the parallel runway, he has you in sight.' we did not see that traffic despite 3 sets of eyes looking for it and proceeded onto runway 13R, offsetting so as to stay clear. While we were aligning with runway 13R, but not yet on straight-in final (west of taxiway B) we got a TCASII TA followed immediately by an RA. Our geographic location was over the dry docks/coast guard station. We still did not see the traffic so we honored the RA. I banked the airplane left and saw the caravan very close and separating from underneath me. Estimated miss distance was 100 ft. We observed '-01' altitude difference on the TCASII RA. The cessna pulled ahead and landed on runway 13L. We landed on runway 13R behind and then abeam the cessna. We were closer in the air than we were on the parallel runways. In our opinion, the caravan was at best lined up with runway 13R. During the conflict we had not yet lined up with runway 13R -- we were still west of centerline. I talked with the pilot on the telephone after the event. The discussion was unproductive.

Original NASA ASRS Text

Title: B737-400 CREW HAD AN NMAC WITH A C208 IN BFI CLASS D AIRSPACE.

Narrative: NEAR MISS. WE WERE CLRED HARBOR VISUAL TO RWY 13R AND ENTERED ELLIOTT BAY BELOW 2000 FT. BOEING TWR RPTED 'TFC AT 11 O'CLOCK POS TO THE PARALLEL RWY, HE HAS YOU IN SIGHT.' WE DID NOT SEE THAT TFC DESPITE 3 SETS OF EYES LOOKING FOR IT AND PROCEEDED ONTO RWY 13R, OFFSETTING SO AS TO STAY CLR. WHILE WE WERE ALIGNING WITH RWY 13R, BUT NOT YET ON STRAIGHT-IN FINAL (W OF TXWY B) WE GOT A TCASII TA FOLLOWED IMMEDIATELY BY AN RA. OUR GEOGRAPHIC LOCATION WAS OVER THE DRY DOCKS/COAST GUARD STATION. WE STILL DID NOT SEE THE TFC SO WE HONORED THE RA. I BANKED THE AIRPLANE L AND SAW THE CARAVAN VERY CLOSE AND SEPARATING FROM UNDERNEATH ME. ESTIMATED MISS DISTANCE WAS 100 FT. WE OBSERVED '-01' ALT DIFFERENCE ON THE TCASII RA. THE CESSNA PULLED AHEAD AND LANDED ON RWY 13L. WE LANDED ON RWY 13R BEHIND AND THEN ABEAM THE CESSNA. WE WERE CLOSER IN THE AIR THAN WE WERE ON THE PARALLEL RWYS. IN OUR OPINION, THE CARAVAN WAS AT BEST LINED UP WITH RWY 13R. DURING THE CONFLICT WE HAD NOT YET LINED UP WITH RWY 13R -- WE WERE STILL W OF CTRLINE. I TALKED WITH THE PLT ON THE TELEPHONE AFTER THE EVENT. THE DISCUSSION WAS UNPRODUCTIVE.

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.