Narrative:

While beginning the initial takeoff roll the first officer pressed toga and we quickly realized the autothrottles had not been armed. We had a very quick discussion of whether or not the before takeoff checklist had been accomplished. Since I always arm the autothrottles during the before takeoff checklist and there was doubt on the checklist being accomplished I made the decision to reject the takeoff and taxi back. We were at taxi speed when this occurred and normal braking was used to exit the runway. We taxied clear; accomplished the checklist and continued the flight as normal. Contributing factors were thunderstorms in the area; a new ATIS and two runway crossings during the taxi.the decision to reject the takeoff and make sure the checklist was completed was the safest course of action. I usually check the autothrottles are armed when we receive the takeoff clearance; but didn't this time due to the distractions previously listed. One of the things that always gets covered during the brief these days is the lack of proficiency and the need to be extra vigilant. This event is a good example of that.

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Original NASA ASRS Text

Title: Air carrier flight crew reported being distracted and not arming the autothrottle prior to departure resulting in a rejected takeoff.

Narrative: While beginning the initial takeoff roll the FO pressed TOGA and we quickly realized the autothrottles had not been armed. We had a very quick discussion of whether or not the before takeoff checklist had been accomplished. Since I always arm the autothrottles during the before takeoff checklist and there was doubt on the checklist being accomplished I made the decision to reject the takeoff and taxi back. We were at taxi speed when this occurred and normal braking was used to exit the runway. We taxied clear; accomplished the checklist and continued the flight as normal. Contributing factors were thunderstorms in the area; a new ATIS and two runway crossings during the taxi.The decision to reject the takeoff and make sure the checklist was completed was the safest course of action. I usually check the autothrottles are armed when we receive the takeoff clearance; but didn't this time due to the distractions previously listed. One of the things that always gets covered during the brief these days is the lack of proficiency and the need to be extra vigilant. This event is a good example of that.

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.