Bellanca Aircraft Corp Undifferentiated or Other Model
Flight Crew Commercial; Flight Crew Instrument; Maintenance Airframe; Maintenance Inspection Authority; Maintenance Powerplant
Flight Crew Last 90 Days 35; Flight Crew Total 2535; Flight Crew Type 47
Other / Unknown
Aircraft Equipment Problem Critical; Ground Event / Encounter Loss Of Aircraft Control
Aircraft Aircraft Damaged
Aircraft
Ground loop occurred after landing and the collapse of the left main landing gear.  The contributing factor that caused my loss of control and the resulting ground loop was a broken/missing (was not found) bolt in the left landing gear attach point.  There were no injuries.  There was no damage to property.  Minor damage occurred to the landing gear center attach bracket and the left wheel.  There was no damage to the wings or tail surfaces.  There was no prop strike. The plane did not cause any traffic disruptions or airport closure.  In retrospect; this was could have been prevented if I had caught the broken/missing bolt during preflight. On a positive note; landing this aircraft at the appropriate; recommended speed helped prevent this ground loop from being a violent landing.
Aeronca 11AC Pilot reported the left main gear collapsed due to a missing gear part.