Flight crew of medium large transport inadvertently deviates from taxi instructions.

Attributes
ACN	113372
Time
Date	198906
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lgb
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 140 flight time total : 8000 flight time type : 2000
ASRS Report	113372
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	incursion : runway non adherence : clearance
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Taxi clearance was to 'taxi to runway 30, hold short of 25L on taxiway C'. I saw the 25L runway sign, ground cleared me to cross 25L. I crossed 34R and runway 30. Halfway through the intersection I realized my mistake. I asked ground to confirm the taxi instructions. They said to continue across and next time use taxiway C to the end of 30. This was my first time at long beach. As I taxied out using the airport diagram I became confused on the route. I should have stopped and asked ground control. Even though I thought I knew where I was going it just didn't look right.

Original NASA ASRS Text

Title: FLT CREW OF MLG INADVERTENTLY DEVIATES FROM TAXI INSTRUCTIONS.

Narrative: TAXI CLRNC WAS TO 'TAXI TO RWY 30, HOLD SHORT OF 25L ON TXWY C'. I SAW THE 25L RWY SIGN, GND CLRED ME TO CROSS 25L. I CROSSED 34R AND RWY 30. HALFWAY THROUGH THE INTXN I REALIZED MY MISTAKE. I ASKED GND TO CONFIRM THE TAXI INSTRUCTIONS. THEY SAID TO CONTINUE ACROSS AND NEXT TIME USE TXWY C TO THE END OF 30. THIS WAS MY FIRST TIME AT LONG BEACH. AS I TAXIED OUT USING THE ARPT DIAGRAM I BECAME CONFUSED ON THE ROUTE. I SHOULD HAVE STOPPED AND ASKED GND CTL. EVEN THOUGH I THOUGHT I KNEW WHERE I WAS GOING IT JUST DIDN'T LOOK RIGHT.

Data retrieved from NASA's ASRS site as of August 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.