An air carrier medium large transport taxied via the wrong route.

Attributes
ACN	262065
Time
Date	199401
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : hou
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Navigation In Use	Other Other
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : commercial pilot : flight engineer
Experience	flight time last 90 days : 240 flight time total : 7000 flight time type : 3000
ASRS Report	262065
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	incursion : runway non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were taxiing to runway 30L at hou. We were given clearance to taxi via charlie. This is a new route for us, as we have been using taxiway microphone for a number of yrs. The captain, out of old habit, followed microphone. I was not aware of anything wrong because I was reading the checklist. I should have noticed, but it seemed normal since we have gone this way many times before. Just as we were about to cross runway 30R, the captain asked me how we were cleared and I said 'via charlie.' we both were now aware of our mistake, but it was too late. We had already crossed runway 30R. The problem we both found was that we were used to doing the same thing. When the instruction changed, we missed it.

Original NASA ASRS Text

Title: AN ACR MLG TAXIED VIA THE WRONG RTE.

Narrative: WE WERE TAXIING TO RWY 30L AT HOU. WE WERE GIVEN CLRNC TO TAXI VIA CHARLIE. THIS IS A NEW RTE FOR US, AS WE HAVE BEEN USING TXWY MIKE FOR A NUMBER OF YRS. THE CAPT, OUT OF OLD HABIT, FOLLOWED MIKE. I WAS NOT AWARE OF ANYTHING WRONG BECAUSE I WAS READING THE CHKLIST. I SHOULD HAVE NOTICED, BUT IT SEEMED NORMAL SINCE WE HAVE GONE THIS WAY MANY TIMES BEFORE. JUST AS WE WERE ABOUT TO CROSS RWY 30R, THE CAPT ASKED ME HOW WE WERE CLRED AND I SAID 'VIA CHARLIE.' WE BOTH WERE NOW AWARE OF OUR MISTAKE, BUT IT WAS TOO LATE. WE HAD ALREADY CROSSED RWY 30R. THE PROB WE BOTH FOUND WAS THAT WE WERE USED TO DOING THE SAME THING. WHEN THE INSTRUCTION CHANGED, WE MISSED IT.

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.