Narrative:

After engine start, our taxi instructions were 'runway 9L via taxiway H, B, A7, T.' after receiving release from pushback crew, a left turnout from our company gate at ord was made onto what was thought to be taxiway H. At the last min, the crew realized it was runway 9L. The brakes were applied immediately, but not in time to keep the nosewheel from entering the runway. After ground was informed, we were told to turn left on runway 9L, taxi west to next exit, and turn left to rejoin taxiway B. There wasn't any traffic landing or departing runway 9L at the time of the incident. Contributing factors: 1) it was XW30 pm on my body clock, the 4TH day of 5 days of flying, and I was very tired. 2) first leg of flying with a new crew. 3) captain and so had 1 month of experience in their respective seats. 4) first officer was reviewing departure chart instead of watching outside. 5) so was out of cockpit at time of incident, assisting flight attendant with baggage problem. Remedies: 1) everyone's attention outside until established on taxiway. 2) all baggage, passenger, cabin problems, etc, resolved before leaving gate. 3) on first leg with new crew, go slower, ask lots of questions, verify everything, don't assume anything. 4) for fatigue problems, take naps when possible to help stay more alert during long stretches of flying.

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Original NASA ASRS Text

Title: AN ACR FLC INADVERTENTLY TAXIED ONTO A RWY. THE CAPT CITED DISTR, FATIGUE, INEXPERIENCE IN CREW MEMBER POS, AND A LACK OF FAMILIARITY WITH THE ARPT.

Narrative: AFTER ENG START, OUR TAXI INSTRUCTIONS WERE 'RWY 9L VIA TXWY H, B, A7, T.' AFTER RECEIVING RELEASE FROM PUSHBACK CREW, A L TURNOUT FROM OUR COMPANY GATE AT ORD WAS MADE ONTO WHAT WAS THOUGHT TO BE TXWY H. AT THE LAST MIN, THE CREW REALIZED IT WAS RWY 9L. THE BRAKES WERE APPLIED IMMEDIATELY, BUT NOT IN TIME TO KEEP THE NOSEWHEEL FROM ENTERING THE RWY. AFTER GND WAS INFORMED, WE WERE TOLD TO TURN L ON RWY 9L, TAXI W TO NEXT EXIT, AND TURN L TO REJOIN TXWY B. THERE WASN'T ANY TFC LNDG OR DEPARTING RWY 9L AT THE TIME OF THE INCIDENT. CONTRIBUTING FACTORS: 1) IT WAS XW30 PM ON MY BODY CLOCK, THE 4TH DAY OF 5 DAYS OF FLYING, AND I WAS VERY TIRED. 2) FIRST LEG OF FLYING WITH A NEW CREW. 3) CAPT AND SO HAD 1 MONTH OF EXPERIENCE IN THEIR RESPECTIVE SEATS. 4) FO WAS REVIEWING DEP CHART INSTEAD OF WATCHING OUTSIDE. 5) SO WAS OUT OF COCKPIT AT TIME OF INCIDENT, ASSISTING FLT ATTENDANT WITH BAGGAGE PROB. REMEDIES: 1) EVERYONE'S ATTN OUTSIDE UNTIL ESTABLISHED ON TXWY. 2) ALL BAGGAGE, PAX, CABIN PROBS, ETC, RESOLVED BEFORE LEAVING GATE. 3) ON FIRST LEG WITH NEW CREW, GO SLOWER, ASK LOTS OF QUESTIONS, VERIFY EVERYTHING, DON'T ASSUME ANYTHING. 4) FOR FATIGUE PROBS, TAKE NAPS WHEN POSSIBLE TO HELP STAY MORE ALERT DURING LONG STRETCHES OF FLYING.

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.