Track deviation intruded on adjacent approach.

Attributes
ACN	275046
Time
Date	199406
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lax
State Reference	CA
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : lax
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
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
Navigation In Use	Other Other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 180 flight time total : 3700 flight time type : 500
ASRS Report	275046
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : far other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 800 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

I was flying a visual approach on a right base to final to runway 24R at lax. Had visual on an air carrier airbus 320 (he was for runway 24L at lax) and was maintaining visual separation, in a 10 degree bank, when I realized I had misjudged the rate of closure and increased to 20-25 degree bank to maintain adequate separation. This happened between 7-5 mi final. At a 2 mi final air carrier airbus reported to tower that they had had to alter course to keep separation from us. The captain and I feel we maintained adequate separation and didn't see him alter course and if he did it was probably because of his TCASII. However, all pilots seem to perceive distances differently. We feel as if we were never more than 800 ft from him and always above him. I feel the workload at that point contributed to our getting closer than we had planned. I also feel as though I was watching the airbus so much that I didn't look at the airport/runway alignment well enough. Parallel approachs should not be done 'along side' other aircraft.

Original NASA ASRS Text

Title: TRACK DEV INTRUDED ON ADJACENT APCH.

Narrative: I WAS FLYING A VISUAL APCH ON A R BASE TO FINAL TO RWY 24R AT LAX. HAD VISUAL ON AN ACR AIRBUS 320 (HE WAS FOR RWY 24L AT LAX) AND WAS MAINTAINING VISUAL SEPARATION, IN A 10 DEG BANK, WHEN I REALIZED I HAD MISJUDGED THE RATE OF CLOSURE AND INCREASED TO 20-25 DEG BANK TO MAINTAIN ADEQUATE SEPARATION. THIS HAPPENED BTWN 7-5 MI FINAL. AT A 2 MI FINAL ACR AIRBUS RPTED TO TWR THAT THEY HAD HAD TO ALTER COURSE TO KEEP SEPARATION FROM US. THE CAPT AND I FEEL WE MAINTAINED ADEQUATE SEPARATION AND DIDN'T SEE HIM ALTER COURSE AND IF HE DID IT WAS PROBABLY BECAUSE OF HIS TCASII. HOWEVER, ALL PLTS SEEM TO PERCEIVE DISTANCES DIFFERENTLY. WE FEEL AS IF WE WERE NEVER MORE THAN 800 FT FROM HIM AND ALWAYS ABOVE HIM. I FEEL THE WORKLOAD AT THAT POINT CONTRIBUTED TO OUR GETTING CLOSER THAN WE HAD PLANNED. I ALSO FEEL AS THOUGH I WAS WATCHING THE AIRBUS SO MUCH THAT I DIDN'T LOOK AT THE ARPT/RWY ALIGNMENT WELL ENOUGH. PARALLEL APCHS SHOULD NOT BE DONE 'ALONG SIDE' OTHER ACFT.

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.