E145 crew had runway incursion at maf.

Attributes
ACN	496037
Time
Date	200012
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : maf.airport
State Reference	TX
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : instrument pilot : multi engine pilot : atp
Experience	flight time last 90 days : 200 flight time total : 3600 flight time type : 180
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	incursion : runway non adherence : clearance non adherence : company policies non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other controllera other flight crewa other flight crewb
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:

Midland ground issued taxi instructions to runway 34L. We approached intersection P that led to runway 34L threshold, there was some confusion by the crew as to where the end of the runway was located as taxiway left is very close and that leads to runway 4 which was not the active runway at the time. Our aircraft taxied past runway 34L and onto taxiway left that led to runway 4. Ground control questioned us and we were given permission to taxi onto runway 4 and then proceed north at the intersection of runway 34L to the threshold. All these events occurred in a matter of 5-10 seconds from the time our crew questioned our position until we had taxied onto runway 4 via taxiway left. No conflict with other aircraft or ground vehicles occurred. Contributing factors: clear VFR day, last leg of sequence, failure to stop the aircraft's taxi and question ATC the moment there was any doubt as to the correct location of runway 34L threshold.

Original NASA ASRS Text

Title: E145 CREW HAD RWY INCURSION AT MAF.

Narrative: MIDLAND GND ISSUED TAXI INSTRUCTIONS TO RWY 34L. WE APCHED INTXN P THAT LED TO RWY 34L THRESHOLD, THERE WAS SOME CONFUSION BY THE CREW AS TO WHERE THE END OF THE RWY WAS LOCATED AS TXWY L IS VERY CLOSE AND THAT LEADS TO RWY 4 WHICH WAS NOT THE ACTIVE RWY AT THE TIME. OUR ACFT TAXIED PAST RWY 34L AND ONTO TXWY L THAT LED TO RWY 4. GND CTL QUESTIONED US AND WE WERE GIVEN PERMISSION TO TAXI ONTO RWY 4 AND THEN PROCEED N AT THE INTXN OF RWY 34L TO THE THRESHOLD. ALL THESE EVENTS OCCURRED IN A MATTER OF 5-10 SECONDS FROM THE TIME OUR CREW QUESTIONED OUR POS UNTIL WE HAD TAXIED ONTO RWY 4 VIA TXWY L. NO CONFLICT WITH OTHER ACFT OR GND VEHICLES OCCURRED. CONTRIBUTING FACTORS: CLR VFR DAY, LAST LEG OF SEQUENCE, FAILURE TO STOP THE ACFT'S TAXI AND QUESTION ATC THE MOMENT THERE WAS ANY DOUBT AS TO THE CORRECT LOCATION OF RWY 34L THRESHOLD.

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.