Runway 35R incursion at sdf, ky by F100 flight crew.

Attributes
ACN	477297
Time
Date	200006
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sdf.airport
State Reference	KY
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Fokker 100
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 : atp
ASRS Report	4772977
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
ASRS Report	477140
Events
Anomaly	incursion : runway non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Crossed runway 35R approach hold line without being sure of clearance misinterpreted sign to be an IFR hold sign and I was doing the checklist. Stopped just past the line. I think tower cleared us for takeoff but I am not sure of that clearance and we had crossed the line before we clarified.

Original NASA ASRS Text

Title: RWY 35R INCURSION AT SDF, KY BY F100 FLT CREW.

Narrative: CROSSED RWY 35R APCH HOLD LINE WITHOUT BEING SURE OF CLRNC MISINTERPRETED SIGN TO BE AN IFR HOLD SIGN AND I WAS DOING THE CHKLIST. STOPPED JUST PAST THE LINE. I THINK TWR CLRED US FOR TKOF BUT I AM NOT SURE OF THAT CLRNC AND WE HAD CROSSED THE LINE BEFORE WE CLARIFIED.

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.