Narrative:

Upon completing pushback from passenger terminal and engine start, I initiated the taxi checklist. The checklist had been revised without our knowledge, and it caught the captain and I off guard when I called out an item not on previous checklist versions. In the distraction, we didn't realize that we were taxiing past the taxiway sierra (where we should have turned), and onto taxiway papa, about to cross runway 15/33. Ground control instructed us to stop, informed us of our error, and instructed us to taxi to runway 33 via taxiway right onto the runway, right on taxiway echo, then back onto taxiway sierra. The flight was completed without further incident.

Related reports:

Google
 

Original NASA ASRS Text

Title: ACR FO, DISTR BY A NEW TAXI CHKLIST, INVOLVED THE CAPT IN A CONVERSATION WHICH CAUSED HIM TO MISS TXWY S AT BDL.

Narrative: UPON COMPLETING PUSHBACK FROM PAX TERMINAL AND ENG START, I INITIATED THE TAXI CHKLIST. THE CHKLIST HAD BEEN REVISED WITHOUT OUR KNOWLEDGE, AND IT CAUGHT THE CAPT AND I OFF GUARD WHEN I CALLED OUT AN ITEM NOT ON PREVIOUS CHKLIST VERSIONS. IN THE DISTR, WE DIDN'T REALIZE THAT WE WERE TAXIING PAST THE TXWY SIERRA (WHERE WE SHOULD HAVE TURNED), AND ONTO TXWY PAPA, ABOUT TO CROSS RWY 15/33. GND CTL INSTRUCTED US TO STOP, INFORMED US OF OUR ERROR, AND INSTRUCTED US TO TAXI TO RWY 33 VIA TXWY R ONTO THE RWY, R ON TXWY ECHO, THEN BACK ONTO TXWY SIERRA. THE FLT WAS COMPLETED WITHOUT FURTHER INCIDENT.

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.