B737-300 crew had less than legal separation from light aircraft that incurred S-46 class B.

Attributes
ACN	521792
Time
Date	200108
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sea.airport
State Reference	WA
Altitude	msl single value : 3500
Environment
Flight Conditions	VMC
Aircraft 1
Controlling Facilities	tower : s46.tower
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : s46.tracon
Operator	general aviation : personal
Make Model Name	Small Aircraft
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 13500 flight time type : 3500
ASRS Report	521792
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	airspace violation : entry non adherence : published procedure non adherence : far other anomaly other other spatial deviation
Independent Detector	other controllera other flight crewa other flight crewb
Resolutory Action	controller : provided flight assist flight crew : took evasive action none taken : detected after the fact other
Consequence	faa : reviewed incident with flight crew faa : investigated other
Miss Distance	horizontal : 7500 vertical : 0
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Near miss -- light aircraft in sea class B airspace without clearance. Co-altitude with separation of about 1.25 mi. Talked with departure control supervisor on phone when landed at destination and he said incident would be turned over to local FAA FSDO for action. Controller did good job considering light airplane pilot seemed confused and did not know where he was. Clear -- first officer flying and distracted from flight instruments looking for aircraft when TCASII gave traffic warning and missed turn to 250 degrees by about .4 mi. Controller called for turn to 270 degrees at same time as first officer started turn to 250 degrees. I had light aircraft in sight at about 3 mi separation and was about to call for a turn just as first officer started his turn.

Original NASA ASRS Text

Title: B737-300 CREW HAD LESS THAN LEGAL SEPARATION FROM LIGHT ACFT THAT INCURRED S-46 CLASS B.

Narrative: NEAR MISS -- LIGHT ACFT IN SEA CLASS B AIRSPACE WITHOUT CLRNC. CO-ALT WITH SEPARATION OF ABOUT 1.25 MI. TALKED WITH DEP CTL SUPVR ON PHONE WHEN LANDED AT DEST AND HE SAID INCIDENT WOULD BE TURNED OVER TO LCL FAA FSDO FOR ACTION. CTLR DID GOOD JOB CONSIDERING LIGHT AIRPLANE PLT SEEMED CONFUSED AND DID NOT KNOW WHERE HE WAS. CLR -- FO FLYING AND DISTRACTED FROM FLT INSTS LOOKING FOR ACFT WHEN TCASII GAVE TFC WARNING AND MISSED TURN TO 250 DEGS BY ABOUT .4 MI. CTLR CALLED FOR TURN TO 270 DEGS AT SAME TIME AS FO STARTED TURN TO 250 DEGS. I HAD LIGHT ACFT IN SIGHT AT ABOUT 3 MI SEPARATION AND WAS ABOUT TO CALL FOR A TURN JUST AS FO STARTED HIS TURN.

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.