BA31 crew had runway incursion when nose of aircraft crossed the runway hold short line.

Attributes
ACN	405200
Time
Date	199806
Day	Mon
Local Time Of Day	0601 To 1200
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 carrier
Make Model Name	Jetstream 31
Operating Under FAR Part	Part 121
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 : 130 flight time total : 3600 flight time type : 110
ASRS Report	405200
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 flight crewa
Resolutory Action	controller : issued new clearance
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was cleared to taxi from our ramp to runway 12L, via the inner circle (taxiway D) to runway 6 and hold short of runway 12R on runway 6. I was then instructed to cross runway 12R. As I was approaching runway 12R, I was fixated on the runway signs for runway 13. When I realized this, the nose of my aircraft had crossed the hold short lines for runway 12L. I had my first officer immediately notify tower of our position. Tower, which had just cleared airline X for takeoff at the intersection ahead of us on runway 12L, instructed us to taxi into position and hold behind the departing airline X jet. I attribute my mistake to inexperience and the different visual cues one has taxiing on a runway versus a taxiway.

Original NASA ASRS Text

Title: BA31 CREW HAD RWY INCURSION WHEN NOSE OF ACFT CROSSED THE RWY HOLD SHORT LINE.

Narrative: I WAS CLRED TO TAXI FROM OUR RAMP TO RWY 12L, VIA THE INNER CIRCLE (TXWY D) TO RWY 6 AND HOLD SHORT OF RWY 12R ON RWY 6. I WAS THEN INSTRUCTED TO CROSS RWY 12R. AS I WAS APCHING RWY 12R, I WAS FIXATED ON THE RWY SIGNS FOR RWY 13. WHEN I REALIZED THIS, THE NOSE OF MY ACFT HAD CROSSED THE HOLD SHORT LINES FOR RWY 12L. I HAD MY FO IMMEDIATELY NOTIFY TWR OF OUR POS. TWR, WHICH HAD JUST CLRED AIRLINE X FOR TKOF AT THE INTXN AHEAD OF US ON RWY 12L, INSTRUCTED US TO TAXI INTO POS AND HOLD BEHIND THE DEPARTING AIRLINE X JET. I ATTRIBUTE MY MISTAKE TO INEXPERIENCE AND THE DIFFERENT VISUAL CUES ONE HAS TAXIING ON A RWY VERSUS A TXWY.

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.