Medium large transport taxi for takeoff possible runway incursion at mdw.

Attributes
ACN	464338
Time
Date	200002
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : mdw.airport
State Reference	IL
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
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
Experience	controller military : 10 controller radar : 6 flight time last 90 days : 180 flight time total : 6500 flight time type : 3500
ASRS Report	464338
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	incursion : runway non adherence : far non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : exited adverse environment none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance Airport
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While taxiing for takeoff at midway airport it is possible I could have crossed the hold short line on runway 22. It was very dark and the hold short line was difficult to see. If I did cross the line I don't believe I completely crossed it. At no time did I come close to entering the runway. I believe this was caused by two elements. First, it was very dark and the line was difficult to see. Second, the taxiway curves at the end and meets the runway end. At other airports the hold short line is just prior to the runway. At midway on runway 22 the hold short is prior to the turn. This could cause confusion.

Original NASA ASRS Text

Title: MLG TAXI FOR TKOF POSSIBLE RWY INCURSION AT MDW.

Narrative: WHILE TAXIING FOR TKOF AT MIDWAY ARPT IT IS POSSIBLE I COULD HAVE CROSSED THE HOLD SHORT LINE ON RWY 22. IT WAS VERY DARK AND THE HOLD SHORT LINE WAS DIFFICULT TO SEE. IF I DID CROSS THE LINE I DON'T BELIEVE I COMPLETELY CROSSED IT. AT NO TIME DID I COME CLOSE TO ENTERING THE RWY. I BELIEVE THIS WAS CAUSED BY TWO ELEMENTS. FIRST, IT WAS VERY DARK AND THE LINE WAS DIFFICULT TO SEE. SECOND, THE TXWY CURVES AT THE END AND MEETS THE RWY END. AT OTHER ARPTS THE HOLD SHORT LINE IS JUST PRIOR TO THE RWY. AT MIDWAY ON RWY 22 THE HOLD SHORT IS PRIOR TO THE TURN. THIS COULD CAUSE CONFUSION.

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.