Factual Information
The accident occurred on 4 August 2017 at 16:10 local time at Dunaújváros Airfield (LHDV). The aircraft involved was a Bellanca 8GCBC, registration HA-KYL, operated by Malév Aero Club. The aircraft sustained damage resulting in its destruction. There were no fatalities or severe injuries.
Investigation
The Transportation Safety Bureau of Hungary (TSB) conducted the technical investigation under EU Regulation 996/2010 and Hungarian law. The TSB notified the civil aviation authority, EASA, and the NTSB as the state of manufacturer. The investigating committee included representatives from American Champion Aircraft Corporation and the FAA. The report is a translation from Hungarian; the Hungarian version is the official record.
The investigation focused on the aircraft fire. The analysis identified the starting point of the fire and examined its development in the engine compartment and cockpit. The primary electrical system of the airplane was also analyzed. The report references Service Letter 418 and Special Airworthiness Information Bulletin CE-18-20, which are included as annexes.
Conclusion
The final report details factual findings and causes (not fully excerpted here). No probable cause was explicitly stated in the provided source material.