A TCASII RA on a visual approach to the parallel runway 25's at lax, ca.

Attributes
ACN	532712
Time
Date	200112
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lax.airport
State Reference	CA
Altitude	msl single value : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air taxi
Make Model Name	Brasilia EMB-120 All Series
Operating Under FAR Part	Part 119
Navigation In Use	other
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 : atp
Experience	flight time last 90 days : 225 flight time total : 9000 flight time type : 1200
ASRS Report	532712
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : atp
Experience	flight time last 90 days : 240 flight time total : 1500 flight time type : 2200
ASRS Report	532910
Events
Anomaly	conflict : airborne critical non adherence : clearance non adherence : company policies non adherence : published procedure
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : took precautionary avoidance action other
Supplementary
Problem Areas	FAA ATC Human Performance Flight Crew Human Performance ATC Facility
Primary Problem	ATC Human Performance
Air Traffic Incident	Pilot Deviation Operational Deviation

Narrative:

While on the civet arrival to runway 25L, at gaate intersection we were given instructions to report runway 25R in sight for a visual. Due to the setting sun the runway was not in sight until approximately 10 ILS DME. We report the runway 25R in sight and were advised another aircraft was cleared for a visual to runway 25L and we were cleared for a visual runway 25R. At approximately limma intersection a TCASII RA advised us to slightly deviate. I looked out my left side window to see a commuter plane extremely close to our left wingtip. We slowed immediately to the approach speed of 128 KTS but the commuter plane stayed just forward of our left wing. A turn to the right we felt would interfere with arrs to the north complex of runways 24L/right of lax. We also felt that a go around might cause an upset to the commuter plane. We continued an approach simultaneously with the commuter and landed at the same moment. We were sure they had to have had a visual on us, but at what point they made visual contact and slide into our left wingman position is unknown to us. It is our opinion that regardless whether cleared for a visual approach, it should only be allowed to be executed in a staggered format especially as close a runway 25L/right at lax are spaced. We felt the commuter plane should not have maneuvered so close to a B757.

Original NASA ASRS Text

Title: A TCASII RA ON A VISUAL APCH TO THE PARALLEL RWY 25'S AT LAX, CA.

Narrative: WHILE ON THE CIVET ARR TO RWY 25L, AT GAATE INTXN WE WERE GIVEN INSTRUCTIONS TO RPT RWY 25R IN SIGHT FOR A VISUAL. DUE TO THE SETTING SUN THE RWY WAS NOT IN SIGHT UNTIL APPROX 10 ILS DME. WE RPT THE RWY 25R IN SIGHT AND WERE ADVISED ANOTHER ACFT WAS CLRED FOR A VISUAL TO RWY 25L AND WE WERE CLRED FOR A VISUAL RWY 25R. AT APPROX LIMMA INTXN A TCASII RA ADVISED US TO SLIGHTLY DEVIATE. I LOOKED OUT MY L SIDE WINDOW TO SEE A COMMUTER PLANE EXTREMELY CLOSE TO OUR L WINGTIP. WE SLOWED IMMEDIATELY TO THE APCH SPD OF 128 KTS BUT THE COMMUTER PLANE STAYED JUST FORWARD OF OUR L WING. A TURN TO THE R WE FELT WOULD INTERFERE WITH ARRS TO THE N COMPLEX OF RWYS 24L/R OF LAX. WE ALSO FELT THAT A GAR MIGHT CAUSE AN UPSET TO THE COMMUTER PLANE. WE CONTINUED AN APCH SIMULTANEOUSLY WITH THE COMMUTER AND LANDED AT THE SAME MOMENT. WE WERE SURE THEY HAD TO HAVE HAD A VISUAL ON US, BUT AT WHAT POINT THEY MADE VISUAL CONTACT AND SLIDE INTO OUR L WINGMAN POS IS UNKNOWN TO US. IT IS OUR OPINION THAT REGARDLESS WHETHER CLRED FOR A VISUAL APCH, IT SHOULD ONLY BE ALLOWED TO BE EXECUTED IN A STAGGERED FORMAT ESPECIALLY AS CLOSE A RWY 25L/R AT LAX ARE SPACED. WE FELT THE COMMUTER PLANE SHOULD NOT HAVE MANEUVERED SO CLOSE TO A B757.

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.