A319 taxiing for departure at iah crossed runway without ATC clearance.

Attributes
ACN	582493
Time
Date	200305
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : iah.airport
State Reference	TX
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	A319
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	582493
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	582388
Events
Anomaly	incursion : runway non adherence : clearance non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Received clearance to taxi to runway 15L at iah from gate. There was no specific taxi route assigned. We taxied on 'nf' to 'nb' missing the 'northeast' to 'northwest' turn to runway 15L. This resulted in an inadvertent crossing of the approach end of runway 15L. This mistake was a result of a relatively short taxi (first officer head down entering final weights and running the checklist) and pilot fatigue caused by 2 consecutive days of long duty periods (11.5 hours and 12.8 hours) followed by a 9 hour layover at the airport hotel.

Original NASA ASRS Text

Title: A319 TAXIING FOR DEP AT IAH CROSSED RWY WITHOUT ATC CLRNC.

Narrative: RECEIVED CLRNC TO TAXI TO RWY 15L AT IAH FROM GATE. THERE WAS NO SPECIFIC TAXI RTE ASSIGNED. WE TAXIED ON 'NF' TO 'NB' MISSING THE 'NE' TO 'NW' TURN TO RWY 15L. THIS RESULTED IN AN INADVERTENT XING OF THE APCH END OF RWY 15L. THIS MISTAKE WAS A RESULT OF A RELATIVELY SHORT TAXI (FO HEAD DOWN ENTERING FINAL WTS AND RUNNING THE CHKLIST) AND PLT FATIGUE CAUSED BY 2 CONSECUTIVE DAYS OF LONG DUTY PERIODS (11.5 HRS AND 12.8 HRS) FOLLOWED BY A 9 HR LAYOVER AT THE ARPT HOTEL.

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.