Narrative:

I started to taxi on the outer taxiway to the runway. There was no other activity on the airport. The taxiway lights were inoperative due to recent construction. There were no reflective markers or other visual indicators along the edge of the taxiway that could have aided me. I used my landing lights to taxi and I inadvertently taxied off the taxiway. I added power to keep up my momentum as I attempted to return to the taxiway. But then the right main gear sunk into the ditch. The recent construction included a new ditch for work on the taxiway lights. The ditch was filled in but the clay was very soft and saturated because of recent rain. After sinking into the ditch, I immediately shut down both engines and all system. The sinking of the right gear into the ditch caused the right propeller to strike the mud. I walked back to the FBO building and called the owner of the aircraft from the outside pay phone. The owner of the aircraft plus the owner of the FBO and a mechanic arrived to try to get out the aircraft. A crane was used to lift out the plane and place it on the taxiway. Then the plane was towed to the hangar with a tug.

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Original NASA ASRS Text

Title: PLT OF AN SMA TWIN ENG ACFT GOT STUCK IN THE MUD AFTER INADVERTENTLY RUNNING OFF THE TXWY AT NIGHT RESULTING IN DAMAGE TO THE R PROP.

Narrative: I STARTED TO TAXI ON THE OUTER TXWY TO THE RWY. THERE WAS NO OTHER ACTIVITY ON THE ARPT. THE TXWY LIGHTS WERE INOP DUE TO RECENT CONSTRUCTION. THERE WERE NO REFLECTIVE MARKERS OR OTHER VISUAL INDICATORS ALONG THE EDGE OF THE TXWY THAT COULD HAVE AIDED ME. I USED MY LNDG LIGHTS TO TAXI AND I INADVERTENTLY TAXIED OFF THE TXWY. I ADDED PWR TO KEEP UP MY MOMENTUM AS I ATTEMPTED TO RETURN TO THE TXWY. BUT THEN THE R MAIN GEAR SUNK INTO THE DITCH. THE RECENT CONSTRUCTION INCLUDED A NEW DITCH FOR WORK ON THE TXWY LIGHTS. THE DITCH WAS FILLED IN BUT THE CLAY WAS VERY SOFT AND SATURATED BECAUSE OF RECENT RAIN. AFTER SINKING INTO THE DITCH, I IMMEDIATELY SHUT DOWN BOTH ENGS AND ALL SYS. THE SINKING OF THE R GEAR INTO THE DITCH CAUSED THE R PROP TO STRIKE THE MUD. I WALKED BACK TO THE FBO BUILDING AND CALLED THE OWNER OF THE ACFT FROM THE OUTSIDE PAY PHONE. THE OWNER OF THE ACFT PLUS THE OWNER OF THE FBO AND A MECH ARRIVED TO TRY TO GET OUT THE ACFT. A CRANE WAS USED TO LIFT OUT THE PLANE AND PLACE IT ON THE TXWY. THEN THE PLANE WAS TOWED TO THE HANGAR WITH A TUG.

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.