Narrative:

Upon arrival at the gate in oak, the 'chocks in' signal was received, at which point the right engine was shut down, and the seat belt sign turned off. I also released the parking brakes, even though the left engine was still running. The aircraft rolled forward, and upon detecting movement I applied the brakes, causing a passenger to fall. It appears that the signal man gave the 'chocks in' in anticipation of the chocks being immediately installed, but the chocks were not put in before the aircraft started again moving. I had kept the #1 engine running until ground power could be applied (APU was not started), and I clearly should not have released the brakes with the engine running. It is company policy, stated in the form, to leave the brakes on until both engines have been shut down, and I normally follow the policy. The passenger was apparently not injured. I believe the signal man also realizes his error and that the same problem will not reoccur.

Google
 

Original NASA ASRS Text

Title: ACFT IS ALLOWED TO ROLL AT THE GATE AND WHEN BRAKES APPLIED, PAX FALLS.

Narrative: UPON ARR AT THE GATE IN OAK, THE 'CHOCKS IN' SIGNAL WAS RECEIVED, AT WHICH POINT THE R ENG WAS SHUT DOWN, AND THE SEAT BELT SIGN TURNED OFF. I ALSO RELEASED THE PARKING BRAKES, EVEN THOUGH THE L ENG WAS STILL RUNNING. THE ACFT ROLLED FORWARD, AND UPON DETECTING MOVEMENT I APPLIED THE BRAKES, CAUSING A PAX TO FALL. IT APPEARS THAT THE SIGNAL MAN GAVE THE 'CHOCKS IN' IN ANTICIPATION OF THE CHOCKS BEING IMMEDIATELY INSTALLED, BUT THE CHOCKS WERE NOT PUT IN BEFORE THE ACFT STARTED AGAIN MOVING. I HAD KEPT THE #1 ENG RUNNING UNTIL GND PWR COULD BE APPLIED (APU WAS NOT STARTED), AND I CLEARLY SHOULD NOT HAVE RELEASED THE BRAKES WITH THE ENG RUNNING. IT IS COMPANY POLICY, STATED IN THE FORM, TO LEAVE THE BRAKES ON UNTIL BOTH ENGS HAVE BEEN SHUT DOWN, AND I NORMALLY FOLLOW THE POLICY. THE PAX WAS APPARENTLY NOT INJURED. I BELIEVE THE SIGNAL MAN ALSO REALIZES HIS ERROR AND THAT THE SAME PROB WILL NOT REOCCUR.

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.