Air carrier sights aircraft cleared for parallel runway directly overhead. While turning away receiv...

Attributes
ACN	252209
Time
Date	199309
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : sea
State Reference	WA
Altitude	msl bound lower : 3500 msl bound upper : 4500
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : sea artcc : zob
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 190 flight time total : 11500 flight time type : 3050
ASRS Report	252209
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : commercial
Events
Anomaly	conflict : airborne less severe non adherence : clearance other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 1000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We had been cleared for and were established on final to runway 34L. An air carrier was asked if they had us in sight. They said yes. The other plane then was told to keep us in sight and cleared for a visual approach to runway 34R. They approached rapidly from the east and at a sharp angle to the final course. Their turn overshot 34R and placed them directly overhead and slightly behind us. All the time they were continuing the approach and descending. We had already started to turn to the west to get out from under the other aircraft when our TCASII gave us an RA. Sea-tac tower also directed us to turn off final to resolve the conflict. The air carrier moved back to the correct final course and both of us were reclred visual finals. The other pilot did not do what he was told to do (keep us in sight) and should have abandoned the approach when he lost sight of us.

Original NASA ASRS Text

Title: ACR SIGHTS ACFT CLRED FOR PARALLEL RWY DIRECTLY OVERHEAD. WHILE TURNING AWAY RECEIVE TCASII RA.

Narrative: WE HAD BEEN CLRED FOR AND WERE ESTABLISHED ON FINAL TO RWY 34L. AN ACR WAS ASKED IF THEY HAD US IN SIGHT. THEY SAID YES. THE OTHER PLANE THEN WAS TOLD TO KEEP US IN SIGHT AND CLRED FOR A VISUAL APCH TO RWY 34R. THEY APCHED RAPIDLY FROM THE E AND AT A SHARP ANGLE TO THE FINAL COURSE. THEIR TURN OVERSHOT 34R AND PLACED THEM DIRECTLY OVERHEAD AND SLIGHTLY BEHIND US. ALL THE TIME THEY WERE CONTINUING THE APCH AND DSNDING. WE HAD ALREADY STARTED TO TURN TO THE W TO GET OUT FROM UNDER THE OTHER ACFT WHEN OUR TCASII GAVE US AN RA. SEA-TAC TWR ALSO DIRECTED US TO TURN OFF FINAL TO RESOLVE THE CONFLICT. THE ACR MOVED BACK TO THE CORRECT FINAL COURSE AND BOTH OF US WERE RECLRED VISUAL FINALS. THE OTHER PLT DID NOT DO WHAT HE WAS TOLD TO DO (KEEP US IN SIGHT) AND SHOULD HAVE ABANDONED THE APCH WHEN HE LOST SIGHT OF US.

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.

Air carrier sights aircraft cleared for parallel runway directly overhead. While turning away receive TCASII RA.