<< >> NASA ASRS Report 286160, October 1994

When turning final from a right base another aircraft overflew medium large transport on a left base resulting in a near midair collision.

Attributes
ACN	286160
Time
Date	199410
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sea
State Reference	WA
Altitude	msl bound lower : 2500 msl bound upper : 2900
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sea
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	approach : visual arrival other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 135
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 20000 flight time type : 3000
ASRS Report	286160
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : nmac non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 0 vertical : 400
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared for husky visual approach from over lake youngs at sea- tac, on left base, controller pointed out traffic on right base. (A commuter airliner) when we were turning final, the other aircraft flew over us by approximately 400 ft! We got an RA warning via TCASII no further problems. Landed normally.

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Original NASA ASRS Text

Title: WHEN TURNING FINAL FROM A R BASE ANOTHER ACFT OVERFLEW MLG ON A L BASE RESULTING IN A NMAC.

Narrative: CLRED FOR HUSKY VISUAL APCH FROM OVER LAKE YOUNGS AT SEA- TAC, ON L BASE, CTLR POINTED OUT TFC ON R BASE. (A COMMUTER AIRLINER) WHEN WE WERE TURNING FINAL, THE OTHER ACFT FLEW OVER US BY APPROX 400 FT! WE GOT AN RA WARNING VIA TCASII NO FURTHER PROBS. LANDED NORMALLY.

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.