Incident Overview
An aircraft experienced a ground loop during a student pilot's landing attempt on its first flight following maintenance for a previously reported nose gear shimmy problem. The aircraft came to rest upside down in a ditch.
Sequence of Events
According to the investigation, the student pilot made an initial landing attempt. Noticing that the nose gear appeared to be cocked, the pilot aborted the landing and executed a go-around. On the second landing attempt, the aircraft swerved to the right as the nose gear touched down. The aircraft then ground-looped, entered a ditch, and flipped inverted.
Examination Findings
Post-incident examination of the nose gear assembly revealed that one of the clamp bolts was missing, and a second bolt was loose. This condition allowed the nose gear strut to pivot freely.
Conclusion
No further causal factors were identified in the report. The investigation did not specify whether any injuries occurred or the extent of damage beyond the aircraft's inverted resting position.