Flight crew of medium large transport taxied across a runway at stl without proper clearance.

Attributes
ACN	425540
Time
Date	199901
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : stl
State Reference	MO
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air taxi
Make Model Name	Commercial Fixed Wing
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 75 flight time total : 32000 flight time type : 6000
ASRS Report	425540
Person 2
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : commercial
Events
Anomaly	incursion : runway non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Air Traffic Incident	Pilot Deviation

Narrative:

We were cleared to taxi for takeoff on runway 12L. As I was taxiing northwest on taxi strip to runway 12L, I verified no aircraft on runway 24 and crossed to proceed to runway 12L. I then realized runway 12L did not extend past runway 24, as my copilot said there is runway 12L. I said I like to go to the end of runway.

Original NASA ASRS Text

Title: FLC OF MLG TAXIED ACROSS A RWY AT STL WITHOUT PROPER CLRNC.

Narrative: WE WERE CLRED TO TAXI FOR TKOF ON RWY 12L. AS I WAS TAXIING NW ON TAXI STRIP TO RWY 12L, I VERIFIED NO ACFT ON RWY 24 AND CROSSED TO PROCEED TO RWY 12L. I THEN REALIZED RWY 12L DID NOT EXTEND PAST RWY 24, AS MY COPLT SAID THERE IS RWY 12L. I SAID I LIKE TO GO TO THE END OF RWY.

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.