Narrative:

I followed the ramp agent's parking instructions into the gate at ict. Ramp was lighted and taxi light was off. It was a dark, VFR, windy night. Agent instructed me to stop and set parking brake. I stopped using toe brakes and pulled handle to set the parking brake. I do not remember if parking brake light on crew panel came on. #2 engine was already feathered on propeller brake. I feathered #1, called for parking checklist. Agent had given me 'set park brake' signal after her 'stop' signal, but she disappeared out of view before I could give her 'parking brake set' signal. I never received a 'chock in place' signal, which is not unusual. Our company requires it, but a lot of times at just about all stations, it is not given to us. About 30 seconds went by when I heard a loud knocking, close to the document door, and a yell. We were startled. Both myself and first officer got on toe brakes, out of instinct, as we checked the overhead panel and cap for warnings/cautions and or faults. I also grabbed the parking brake handle to confirm its position as the first officer pushed the auxiliary hydraulic pump button. We never felt the aircraft move or stop again. I looked out the front windshield, because we felt a slight vibration at our feet. We observed us to be very close to or touching the gpu. We inspected the nose cone and saw a 4 inch long dent in it, about a 1/4 deep. Flight attendant #1 did not feel us move or restop again either, but flight attendant #2, who stood between propellers in cabin, felt a jerk. She doesn't know what it was. Could be #1 feathering, the first officer and I think. Station mechanic told me we rolled 4-6 ft. No chocks in place.

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Original NASA ASRS Text

Title: RPTR THOUGHT THE BRAKES WERE SET BUT WERE NOT. THE RPTR DID NOT ASSURE THE BRAKES WERE SET AND OR THE CHOCKS WERE IN PLACE. THE ACFT ROLLED 4-6 FT INTO THE GPU. THERE WAS A 4 INCH LONG DENT IN THE NOSE CONE.

Narrative: I FOLLOWED THE RAMP AGENT'S PARKING INSTRUCTIONS INTO THE GATE AT ICT. RAMP WAS LIGHTED AND TAXI LIGHT WAS OFF. IT WAS A DARK, VFR, WINDY NIGHT. AGENT INSTRUCTED ME TO STOP AND SET PARKING BRAKE. I STOPPED USING TOE BRAKES AND PULLED HANDLE TO SET THE PARKING BRAKE. I DO NOT REMEMBER IF PARKING BRAKE LIGHT ON CREW PANEL CAME ON. #2 ENG WAS ALREADY FEATHERED ON PROP BRAKE. I FEATHERED #1, CALLED FOR PARKING CHKLIST. AGENT HAD GIVEN ME 'SET PARK BRAKE' SIGNAL AFTER HER 'STOP' SIGNAL, BUT SHE DISAPPEARED OUT OF VIEW BEFORE I COULD GIVE HER 'PARKING BRAKE SET' SIGNAL. I NEVER RECEIVED A 'CHOCK IN PLACE' SIGNAL, WHICH IS NOT UNUSUAL. OUR COMPANY REQUIRES IT, BUT A LOT OF TIMES AT JUST ABOUT ALL STATIONS, IT IS NOT GIVEN TO US. ABOUT 30 SECONDS WENT BY WHEN I HEARD A LOUD KNOCKING, CLOSE TO THE DOCUMENT DOOR, AND A YELL. WE WERE STARTLED. BOTH MYSELF AND FO GOT ON TOE BRAKES, OUT OF INSTINCT, AS WE CHKED THE OVERHEAD PANEL AND CAP FOR WARNINGS/CAUTIONS AND OR FAULTS. I ALSO GRABBED THE PARKING BRAKE HANDLE TO CONFIRM ITS POSITION AS THE FO PUSHED THE AUX HYD PUMP BUTTON. WE NEVER FELT THE ACFT MOVE OR STOP AGAIN. I LOOKED OUT THE FRONT WINDSHIELD, BECAUSE WE FELT A SLIGHT VIBRATION AT OUR FEET. WE OBSERVED US TO BE VERY CLOSE TO OR TOUCHING THE GPU. WE INSPECTED THE NOSE CONE AND SAW A 4 INCH LONG DENT IN IT, ABOUT A 1/4 DEEP. FLT ATTENDANT #1 DID NOT FEEL US MOVE OR RESTOP AGAIN EITHER, BUT FLT ATTENDANT #2, WHO STOOD BTWN PROPS IN CABIN, FELT A JERK. SHE DOESN'T KNOW WHAT IT WAS. COULD BE #1 FEATHERING, THE FO AND I THINK. STATION MECH TOLD ME WE ROLLED 4-6 FT. NO CHOCKS IN PLACE.

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.