AN EMB120 WHILE BACK TAXIING ON RWY AND PREPARING FOR A 180 DEG TURN; THE ACFT L MAIN GEAR DEPARTED THE RWY STRANDING THE ACFT AND INCURRING DAMAGE TO THE L PROP.

Narrative

CAPT BRIEFED A CAPT FLYING; FLAPS 15 DEGS; FULL RWY LENGTH TKOF FOR RWY 1 AT ILE. I STEERED THE ACFT TO THE L (E) SIDE OF THE RWY ANTICIPATING THE 180 DEG TURN AT THE END. AS I APCHED MY INTENDED TURN POINT; I FELT THE L MAIN GEAR LEAVE THE PAVEMENT. I IMMEDIATELY APPLIED R NOSEWHEEL STEERING; AND ADDED ADDITIONAL PWR TO GET BACK ON THE PAVEMENT. IT QUICKLY BECAME APPARENT WE WOULD NOT BE ABLE TO DO SO. I THEN APPLIED THE PARKING BRAKE AND BEGAN RADIO COMS WITH COMPANY AND CTAF/UNICOM TO GET ASSISTANCE. FO WAS INFORMED TO MAINTAIN LISTENING WATCH ON CTAF SINCE WE WERE ON THE RWY. AFTER TRANSPORTATION ARRIVED; PAX DEPLANED NORMALLY. NO INJURIES OR ANXIETIES WERE NOTED. POSTFLT INSPECTION REVEALED 2 WHEEL FURROWS APPROX 3-4 INCHES DEEP; ABOUT 30 FT LONG; STOPPING 12 INCHES FROM PAVEMENT EDGE. A NICK IN ONE L PROP LEADING EDGE 3 INCHES FROM THE TIP WAS ALSO NOTED. MUD HAD BEEN PUSHED IN FRONT OF WHEELS TO A PILE 12-14 INCHES HIGH. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ACFT INCURRED DAMAGE TO THE L PROP AND THE BRAKES AND WHEELS WERE REPLACED. THE RPTR SAID THE ACFT WAS MAINT FERRIED TO THE OVERHAUL SHOP AND A PRECAUTIONARY GEAR SWING ACCOMPLISHED.