THE R MAIN GEAR TRAILING SCISSOR BOLT FAILED ON AN SMA TWIN CAUSING CONSIDERABLE DAMAGE.

Narrative

ON MAY/MON/93; I PILOTED AN SMA TWIN; REGISTRATION NUMBER NX. ON THIS DAY; I PERFORMED A THOROUGH PREFLT INSPECTION OF THE ACFT; WITH EMPHASIS ON THE GEAR AND ITS COMPONENTS (WHICH OBVIOUSLY INCLUDED ALL BOLTS) AND FOUND EVERYTHING TO BE SAFE FOR FLT. THE ENTIRE FLT WAS CONDUCTED IN AN ARPT TFC PATTERN. JUST SECONDS (PERHAPS 2 OR 3) AFTER TOUCHDOWN; I EXPERIENCED VIBRATION FROM THE R SIDE OF THE ACFT. FEARING A TIRE BLOWOUT; I IMMEDIATELY DECELERATED THE ACFT ON THE RWY. WHEN CLRING THE RWY; I AGAIN FELT VIBRATION WHICH IMMEDIATELY PROMPTED ME TO SHUT DOWN WITH ENGS TO PREVENT DAMAGE TO THEM IN CASE OF A GEAR COLLAPSE. I DEPLANED TO FIND THE R MAIN GEAR TRAILING SCISSOR BOLT FAILED. OTHER DAMAGE INCLUDED ANOTHER BOLT FAILURE (SAME MAIN) AND A TEAR OF METAL IN THE GEAR WELL. I QUICKLY GOT ASSISTANCE FROM A MECH TO TOW THE ACFT TO A HANGAR. THE FOLLOWING MORNING I SPOKE WITH MR. Y (AIRWORTHINESS INSPECTOR) AT THE ORLANDO; FL; FSDO. I EXPLAINED THE OCCURRENCE IN DETAIL TO BE CLR ON NTSB RPTING REQUIREMENTS. MR. Y TOLD ME THAT FAILURE OF THE SCISSOR BOLT CAUSED THE SUBSEQUENT DAMAGE AND THAT THE OCCURRENCE WAS NOT CONSIDERED AN ACCIDENT NOR A RPTABLE INCIDENT. I FEEL IT IS IMPORTANT FOR ME TO STATE THAT THE LNDG WAS BY NO MEANS A 'HARD LNDG.' EVERYTHING WENT WELL THROUGHOUT THE ENTIRE FLT WITH THE EXCEPTION OF THE FAILURE OF THAT SCISSOR BOLT.