Narrative:

We thoroughly briefed the taxi including the hot spots; expected route; and runway crossings. I elected to taxi with both engines running to minimize distractions. I had expected to taxi alpha; charlie; cross 4L; 4R; delta; cross 33L to 27. We were cleared echo; bravo; charlie; cross 4L hold short of 4R. I looked at my taxi chart [and] read it back to the first officer but for some reason I thought that M was bravo in my mind. We had trouble up linking the weights into the FMC and the first officer was heads down setting up the box. I approached 4L at echo turned on my lights announced; 'clear left on this runway are you clear right?' the first officer said yes looked to his right and put his head back down. He then [saw] I was crossing 4L at the wrong intersection said 'stop! Stop!' and slammed on the brakes trying to keep us from a runway incursion. We stopped just after the hold short bar. ATC saw that we were stopped [and] told us we had missed bravo but were lucky because it was a closed runway. The flight attendants said that two of them were banged up a little but did not want to return to the gate to seek medical attention and wanted to continue on the flight. One flight attendant said that a cart fell on her arm and hurt it and the other said she hurt her back when she slammed into the coffee pot in first class.

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Original NASA ASRS Text

Title: B737 flight crew reported two flight attendants were injured by an abrupt stop to avoid a runway incursion.

Narrative: We thoroughly briefed the taxi including the hot spots; expected route; and runway crossings. I elected to taxi with both engines running to minimize distractions. I had expected to taxi Alpha; Charlie; cross 4L; 4R; Delta; cross 33L to 27. We were cleared Echo; Bravo; Charlie; cross 4L hold short of 4R. I looked at my taxi chart [and] read it back to the First Officer but for some reason I thought that M was Bravo in my mind. We had trouble up linking the weights into the FMC and the First Officer was heads down setting up the box. I approached 4L at Echo turned on my lights announced; 'Clear left on this runway are you clear right?' The First Officer said yes looked to his right and put his head back down. He then [saw] I was crossing 4L at the wrong intersection said 'Stop! Stop!' and slammed on the brakes trying to keep us from a runway incursion. We stopped just after the hold short bar. ATC saw that we were stopped [and] told us we had missed Bravo but were lucky because it was a closed runway. The flight attendants said that two of them were banged up a little but did not want to return to the gate to seek medical attention and wanted to continue on the flight. One flight attendant said that a cart fell on her arm and hurt it and the other said she hurt her back when she slammed into the coffee pot in first class.

Data retrieved from NASA's ASRS site 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.