Air carrier X TCASII RA on final approach started to execute go around from small transport Y on base leg for parallel runway.

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Attributes
ACN	240893
Time
Date	199305
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : pdx
State Reference	OR
Altitude	msl bound lower : 400 msl bound upper : 400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : pdx artcc : zse
Operator	common carrier : air carrier
Make Model Name	Light Transport, High Wing, 2 Turboprop Eng
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air taxi
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : radar
Experience	controller radar : 15
ASRS Report	240893
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 800 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Air carrier X on final to runway 28L appeared to pull up as if to go around. When questioned, pilot responded that he was responding to a TCASII RA. The only other traffic was base to final, small transport Y for runway 28R. This continues to be a problem for airports with simultaneous visual or visual/ILS approachs.

Original NASA ASRS Text

Title: ACR X TCASII RA ON FINAL APCH STARTED TO EXECUTE GAR FROM SMT Y ON BASE LEG FOR PARALLEL RWY.

Narrative: ACR X ON FINAL TO RWY 28L APPEARED TO PULL UP AS IF TO GAR. WHEN QUESTIONED, PLT RESPONDED THAT HE WAS RESPONDING TO A TCASII RA. THE ONLY OTHER TFC WAS BASE TO FINAL, SMT Y FOR RWY 28R. THIS CONTINUES TO BE A PROB FOR ARPTS WITH SIMULTANEOUS VISUAL OR VISUAL/ILS APCHS.

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.