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Summary

Summary

Following an uneventful flight, the pilot reported that the aircraft touched down normally. After rolling about 80 m the right wing dropped and the pilot suspected a tyre had failed. But about 50 m further on he heard pronounced scraping noises and the aircraft slewed right then left before finally coming to a halt about 10 m to the left of the runway. A subsequent inspection of the aircraft revealed that the fixed landing gear attachment bolts had failed at the countersunk heads. The failure faces contained rust deposits, indicating the bolts had been cracked for some time prior to the accident. The manufacturer has subsequently changed the design specification to fit standard flat head bolts in place of countersunk bolts.
 
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