Runway incursion at lax is disputed.

Attributes
ACN	467720
Time
Date	200003
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lax.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Citation III, VI, VII
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 212 flight time total : 19840 flight time type : 6725
ASRS Report	467720
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : commercial pilot : multi engine pilot : instrument
Experience	flight time last 90 days : 150 flight time total : 20300
ASRS Report	467741
Events
Anomaly	incursion : runway non adherence : clearance other anomaly other
Independent Detector	other controllerb
Resolutory Action	controller : issued new clearance controller : issued advisory other
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Ambiguous

Narrative:

We received taxi clearance prior to taxi from FBO to runway 25R and as I proceeded taxi I started to cross runway 25L and ground controller advised I had taxied onto active runway and said to turn right and exit on next taxiway, which I did immediately. We then received new taxi clearance to taxi on taxiway a to taxiway F, which I did. Both my first officer and I understood clearance to cross runway 25L so there apparently was a misunderstanding. I would not intentionally cross an active runway without clearance. Apparently there was confusion as to how the clearance was given and how it was received and understood.

Original NASA ASRS Text

Title: RWY INCURSION AT LAX IS DISPUTED.

Narrative: WE RECEIVED TAXI CLRNC PRIOR TO TAXI FROM FBO TO RWY 25R AND AS I PROCEEDED TAXI I STARTED TO CROSS RWY 25L AND GND CTLR ADVISED I HAD TAXIED ONTO ACTIVE RWY AND SAID TO TURN R AND EXIT ON NEXT TXWY, WHICH I DID IMMEDIATELY. WE THEN RECEIVED NEW TAXI CLRNC TO TAXI ON TXWY A TO TXWY F, WHICH I DID. BOTH MY FO AND I UNDERSTOOD CLRNC TO CROSS RWY 25L SO THERE APPARENTLY WAS A MISUNDERSTANDING. I WOULD NOT INTENTIONALLY CROSS AN ACTIVE RWY WITHOUT CLRNC. APPARENTLY THERE WAS CONFUSION AS TO HOW THE CLRNC WAS GIVEN AND HOW IT WAS RECEIVED AND UNDERSTOOD.

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.