Background
Air Service Hungary (Repülögépes Szolgalat Allami Vallat) operated a single-engine aircraft on a special flight from Budaörs to Dunakeszi. The flight was carried out on behalf of the Hungarian Aerobatic Club (Magyar Honvédelmi Szövetség – MHSZ). On board were two pilots and seven passengers.
Accident
While flying in limited visibility due to marginal weather conditions, the airplane struck the slope of a mountain located in Hármashatárhegy, in the northern suburb of Budapest. The aircraft disintegrated on impact, and all nine occupants were killed.
Investigation
The investigation determined that the accident was the consequence of a wrong altimeter setting. No additional causal factors were identified in the official findings.