A JS41 crew, taxiing for takeoff at stl, crossed a hold short line without a clearance.

Attributes
ACN	545477
Time
Date	200204
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : stl.airport
State Reference	MO
Altitude	agl single value : 0
Environment
Flight Conditions	VMC VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Jetstream 41
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : cfi pilot : atp
Experience	flight time last 90 days : 150 flight time total : 3400 flight time type : 1600
ASRS Report	545477
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 2600 flight time type : 1400
ASRS Report	545216
Events
Anomaly	incursion : runway non adherence : published procedure non adherence : clearance non adherence : far other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance Airport Weather
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I mistakenly thought I was turning onto runway 6 from taxiway D rather than from taxiway a. (I was instructed by ground to hold short of runway 12R on runway 6.) my first officer and I both noticed we were about to cross the runway 12R hold short line when we both applied heavy braking. The aircraft's nose stopped approximately 10 ft beyond the runway 12R hold short line. Fatigue played a factor in my lack of positional awareness. The aircraft's system, including braking system, were functioning normally -- we had no brake malfunction.

Original NASA ASRS Text

Title: A JS41 CREW, TAXIING FOR TKOF AT STL, CROSSED A HOLD SHORT LINE WITHOUT A CLRNC.

Narrative: I MISTAKENLY THOUGHT I WAS TURNING ONTO RWY 6 FROM TXWY D RATHER THAN FROM TXWY A. (I WAS INSTRUCTED BY GND TO HOLD SHORT OF RWY 12R ON RWY 6.) MY FO AND I BOTH NOTICED WE WERE ABOUT TO CROSS THE RWY 12R HOLD SHORT LINE WHEN WE BOTH APPLIED HVY BRAKING. THE ACFT'S NOSE STOPPED APPROX 10 FT BEYOND THE RWY 12R HOLD SHORT LINE. FATIGUE PLAYED A FACTOR IN MY LACK OF POSITIONAL AWARENESS. THE ACFT'S SYS, INCLUDING BRAKING SYS, WERE FUNCTIONING NORMALLY -- WE HAD NO BRAKE MALFUNCTION.

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.