A light twin aircraft's parking brake was not set after fueling at I39; which has a slightly sloped ...

Attributes
ACN	993898
Time
Date	201202
Place
Locale Reference	I39.Airport
State Reference	KY
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Small Transport Low Wing 2 Recip Eng
Operating Under FAR Part	Part 91
Flight Phase	Parked
Flight Plan	None
Aircraft 2
Make Model Name	Small Aircraft High Wing 1 Eng Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	Taxi
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 900 Flight Crew Type 250
Events
Anomaly	Deviation - Procedural Published Material / Policy Ground Event / Encounter Aircraft

Narrative:

After landing at I39 we parked our aircraft at the fuel pumps. Another aircraft had just refueled and moved to the north side of the pump pad. I went into the FBO to utilize the rest room facilities and my aircraft rolled across the fuel pad and struck the other aircraft in the tail tie down hook. The damage to both aircraft was only cosmetic in nature however the incident could have very easily caused major damage or injury. I did not realize that the fuel pad was constructed on a slope steep enough to allow a 10;000 pounds aircraft to begin to roll across it. My aircraft should have had the wheels blocked and or the parking brake set. The FBO manager told me another aircraft rolled across the pad one day and went down over the hill causing substantial damage. While the cause of the incident was my failure to block the wheels of the aircraft; the contributing causes are the slope of the fuel pad at I39 and my failure to maintain an attitude of 'pilot in command' after the engine were shut down and I exited the aircraft.

Original NASA ASRS Text

Title: A light twin aircraft's parking brake was not set after fueling at I39; which has a slightly sloped ramp. The aircraft rolled across the ramp and struck a Cessna; causing only superficial damage.

Narrative: After landing at I39 we parked our aircraft at the fuel pumps. Another aircraft had just refueled and moved to the north side of the pump pad. I went into the FBO to utilize the rest room facilities and my aircraft rolled across the fuel pad and struck the other aircraft in the tail tie down hook. The damage to both aircraft was only cosmetic in nature however the incident could have very easily caused major damage or injury. I did not realize that the fuel pad was constructed on a slope steep enough to allow a 10;000 LBS aircraft to begin to roll across it. My aircraft should have had the wheels blocked and or the parking brake set. The FBO Manager told me another aircraft rolled across the pad one day and went down over the hill causing substantial damage. While the cause of the incident was my failure to block the wheels of the aircraft; the contributing causes are the slope of the fuel pad at I39 and my failure to maintain an attitude of 'pilot in command' after the engine were shut down and I exited the aircraft.

Data retrieved from NASA's ASRS site as of July 2013 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.

A light twin aircraft's parking brake was not set after fueling at I39; which has a slightly sloped ramp. The aircraft rolled across the ramp and struck a cessna; causing only superficial damage.