Air carrier twin engine jet crew had runway incursion at den.

Attributes
ACN	481236
Time
Date	200008
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : den.airport
State Reference	CO
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
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 : flight engineer pilot : atp
Experience	flight time last 90 days : 200 flight time total : 11000 flight time type : 880
ASRS Report	481236
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Events
Anomaly	incursion : runway non adherence : published procedure non adherence : far non adherence : company policies other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance none taken : detected after the fact other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Taxiing for takeoff, runway 8, den. No other aircraft in vicinity (taxiing, landing or taking off). Only airplane taxiing for runway 8. I became momentarily disoriented, believing I was on taxiway left but actually on taxiway M. Taxiway M leads to runway 8, taxiway left does not. When I realized my position, I had crossed hold line for runway 8. No other aircraft nearby. Advised tower and was cleared for takeoff. Cause: complacency by both pilots. Contributing factor: fatigue.

Original NASA ASRS Text

Title: ACR TWIN ENG JET CREW HAD RWY INCURSION AT DEN.

Narrative: TAXIING FOR TKOF, RWY 8, DEN. NO OTHER ACFT IN VICINITY (TAXIING, LNDG OR TAKING OFF). ONLY AIRPLANE TAXIING FOR RWY 8. I BECAME MOMENTARILY DISORIENTED, BELIEVING I WAS ON TXWY L BUT ACTUALLY ON TXWY M. TXWY M LEADS TO RWY 8, TXWY L DOES NOT. WHEN I REALIZED MY POS, I HAD CROSSED HOLD LINE FOR RWY 8. NO OTHER ACFT NEARBY. ADVISED TWR AND WAS CLRED FOR TKOF. CAUSE: COMPLACENCY BY BOTH PLTS. CONTRIBUTING FACTOR: FATIGUE.

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.