Narrative:

During taxi for takeoff to runway 25R at lax, ground control amended our taxi instructions (due to opposite direction landing traffic) to read 'taxi runway 25R via txwys C, C6, B.' readback was correct. Airport diagram was out and being used for reference. Our aircraft was eastbound on taxiway C, turned right at taxiway C6. First officer was clearing right side of aircraft for previously landed B757, when he sensed a left turn (which was the correct direction), looked left and realized captain had started to turn early. First officer stated 'taxiway B is ahead.' captain paused momentarily and said, 'no this is it.' at that point, ground control instructed us to stop, that the taxiway in question was not stressed for our aircraft and we would have to be escorted. Escort arrived in less than 2 mins, stopped traffic on adjacent service road, escorted us to taxiway B. We proceeded without any further problem. One area that caused some confusion was the close proximity of txwys B and C near taxiway C6. In fact, the taxiway B sign on the left side of taxiway B, is actually located on the right side of taxiway C, in plain view as you make the left turn onto taxiway C. However, the airport diagram is very clear as to the layout of txwys B/C, and was being used for reference. We did not find any information that stated that this taxiway was not stressed as ground control said, but did find a reference to insufficient wing clearance with B747 aircraft on taxiway C and adjacent service road. I have learned that I should have been more assertive with taxi instructions to captain, perhaps applied brakes. Captain did acknowledge that first officer attempted to stop him.

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Original NASA ASRS Text

Title: FLC OF AN MLG DURING TAXI OUT FOR TKOF HAS A TXWY EXCURSION EVEN THOUGH USING THE ARPT DIAGRAM AS REF. GND CTL SAYS THEY WILL NEED AN ESCORT TO RETURN TO CORRECT TXWY.

Narrative: DURING TAXI FOR TKOF TO RWY 25R AT LAX, GND CTL AMENDED OUR TAXI INSTRUCTIONS (DUE TO OPPOSITE DIRECTION LNDG TFC) TO READ 'TAXI RWY 25R VIA TXWYS C, C6, B.' READBACK WAS CORRECT. ARPT DIAGRAM WAS OUT AND BEING USED FOR REF. OUR ACFT WAS EBOUND ON TXWY C, TURNED R AT TXWY C6. FO WAS CLRING R SIDE OF ACFT FOR PREVIOUSLY LANDED B757, WHEN HE SENSED A L TURN (WHICH WAS THE CORRECT DIRECTION), LOOKED L AND REALIZED CAPT HAD STARTED TO TURN EARLY. FO STATED 'TXWY B IS AHEAD.' CAPT PAUSED MOMENTARILY AND SAID, 'NO THIS IS IT.' AT THAT POINT, GND CTL INSTRUCTED US TO STOP, THAT THE TXWY IN QUESTION WAS NOT STRESSED FOR OUR ACFT AND WE WOULD HAVE TO BE ESCORTED. ESCORT ARRIVED IN LESS THAN 2 MINS, STOPPED TFC ON ADJACENT SVC ROAD, ESCORTED US TO TXWY B. WE PROCEEDED WITHOUT ANY FURTHER PROB. ONE AREA THAT CAUSED SOME CONFUSION WAS THE CLOSE PROX OF TXWYS B AND C NEAR TXWY C6. IN FACT, THE TXWY B SIGN ON THE L SIDE OF TXWY B, IS ACTUALLY LOCATED ON THE R SIDE OF TXWY C, IN PLAIN VIEW AS YOU MAKE THE L TURN ONTO TXWY C. HOWEVER, THE ARPT DIAGRAM IS VERY CLR AS TO THE LAYOUT OF TXWYS B/C, AND WAS BEING USED FOR REF. WE DID NOT FIND ANY INFO THAT STATED THAT THIS TXWY WAS NOT STRESSED AS GND CTL SAID, BUT DID FIND A REF TO INSUFFICIENT WING CLRNC WITH B747 ACFT ON TXWY C AND ADJACENT SVC ROAD. I HAVE LEARNED THAT I SHOULD HAVE BEEN MORE ASSERTIVE WITH TAXI INSTRUCTIONS TO CAPT, PERHAPS APPLIED BRAKES. CAPT DID ACKNOWLEDGE THAT FO ATTEMPTED TO STOP HIM.

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.