Narrative:

Ready for engine start in okc. Usually the ground crew calls us when they are removing the chocks to have us set the brakes. In this case they removed them without the call, and they apparently were not set. The before start checklist calls for brakes (either set, for engine start, or released for pushback). As they are almost always set at this point, I must have responded set without really checking. We were starting both engines in preparation for a pushback. The first officer was making the starts. After the first engines were started, we both realized that we were moving forward. I immediately hit the brakes and we came to an abrupt stop. We had rolled forward about 3'. No damage, or contact, so we completed the start sequence and the remainder of the flight was uneventful. I can assure you, the brakes will be checked every time in the future.

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Original NASA ASRS Text

Title: BRAKES NOT SET FOR ACR MLG ENGINE START, ACFT ROLLS FORWARD 3', FORTUNATELY DOES NOT HIT ANYTHING.

Narrative: READY FOR ENGINE START IN OKC. USUALLY THE GND CREW CALLS US WHEN THEY ARE REMOVING THE CHOCKS TO HAVE US SET THE BRAKES. IN THIS CASE THEY REMOVED THEM WITHOUT THE CALL, AND THEY APPARENTLY WERE NOT SET. THE BEFORE START CHECKLIST CALLS FOR BRAKES (EITHER SET, FOR ENGINE START, OR RELEASED FOR PUSHBACK). AS THEY ARE ALMOST ALWAYS SET AT THIS POINT, I MUST HAVE RESPONDED SET WITHOUT REALLY CHECKING. WE WERE STARTING BOTH ENGINES IN PREPARATION FOR A PUSHBACK. THE F/O WAS MAKING THE STARTS. AFTER THE FIRST ENGINES WERE STARTED, WE BOTH REALIZED THAT WE WERE MOVING FORWARD. I IMMEDIATELY HIT THE BRAKES AND WE CAME TO AN ABRUPT STOP. WE HAD ROLLED FORWARD ABOUT 3'. NO DAMAGE, OR CONTACT, SO WE COMPLETED THE START SEQUENCE AND THE REMAINDER OF THE FLT WAS UNEVENTFUL. I CAN ASSURE YOU, THE BRAKES WILL BE CHECKED EVERY TIME IN THE FUTURE.

Data retrieved from NASA's ASRS site as of August 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.