PA23 L GEAR COLLAPSES AS PLT PULLS ONTO THE RWY FOR TKOF AT A NON TWR ARPT.

Narrative

AFTER PREFLT; I TAXIED ACFT TO THE ACTIVE RWY (RWY 8R). I THEN COMPLETED THE ENG RUN-UP. EVERYTHING WAS WORKING FINE. THE ACFT WAS IN TKOF CONFIGN. I MADE A FINAL LOOK AROUND THE PATTERN; THEN I ANNOUNCED OVER THE RADIO (CTAF 123.0) MY INTENTIONS OF DEPARTING TO THE SE. I BEGAN THE TAXI ONTO THE RWY WHEN ALL OF A SUDDEN; THE L GEAR COLLAPSED. I TRIED TO SWING THE PLANE AROUND TO EXIT THE RWY. I THEN ANNOUNCED TO THE FBO WORKING THE UNICOM THAT I NEEDED TO BE TOWED; THE ACFT LNDG GEAR COLLAPSED. I THEN SHUT THE ACFT DOWN AND EXITED THE PLANE TO EXAMINE THE DAMAGE. NO PROP DAMAGE; NO ENG DAMAGE. THE GEAR FOLDED BACKWARDS AFTER A SUPPORT BOLT SHEARED AWAY. FINALLY; ASSISTANCE ARRIVED AND THE ACFT WAS TOWED OFF THE RWY. THE FARS 830.5 STATE THAT IT IS NOT A RPTABLE ACCIDENT; BUT MR X OF THE PALM BEACH COUNTY ARPT OPS LISTED THE OCCURRENCE AS A CATEGORY III ACCIDENT. I ASKED HIM TO NOTIFY FAA AND NTSB OVER THE WEEKEND. HE SAID THEY HAVE MY TELEPHONE NUMBER AND THEY WOULD CALL ME. I NEVER HEARD FROM THEM; SO I'M HOPING THAT THEY UNDERSTAND FAR 830.5 AS I UNDERSTAND IT (NON RPTABLE). THE PROB CAME ABOUT BECAUSE OF A STRESSED SUPPORT BOLT IN THE LNDG GEAR. I RECOMMEND THAT THEY BE CHANGED IN THE ANNUAL INSPECTION.