Narrative:

Pushed off the gate; captain decided to taxi on one engine from gate to 1R. We started #2. Captain forgot to call for flaps on after start check; and there is no line item in the after start check to verify flaps; so if I hadn't caught this misstep it wouldn't have been caught until even later. Why has setting the flaps been removed [from] the checklist?before moving; with the #2 engine running; in order to help decrease workload; and allow for me to be heads up during taxiing; the captain called for the before takeoff check to the line. I announced 'before takeoff check to the line' and ran the check to the line. We taxied out; he called for delayed engine start. I completed this and ran the delayed engine start checklist. We then waited our turn in line and departed without either of us catching that we failed to do the 'final items'. We realized this when the captain ran the after takeoff check and the igniters were off.

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Original NASA ASRS Text

Title: B737 FO reported flight took off without completing the final items on the before takeoff checklist.

Narrative: Pushed off the gate; Captain decided to taxi on one engine from gate to 1R. We started #2. Captain forgot to call for flaps on after start check; and there is no line item in the after start check to verify flaps; so if I hadn't caught this misstep it wouldn't have been caught until even later. Why has setting the flaps been removed [from] the checklist?Before moving; with the #2 engine running; in order to help decrease workload; and allow for me to be heads up during taxiing; the Captain called for the before takeoff check to the line. I announced 'before takeoff check to the line' and ran the check to the line. We taxied out; he called for delayed engine start. I completed this and ran the delayed engine start checklist. We then waited our turn in line and departed without either of us catching that we failed to do the 'final items'. We realized this when the Captain ran the after takeoff check and the igniters were off.

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.