The following is an excerpt from official NTSB summaries of general aviation accidents in the United States.
On the Record: Cessna 421B
Key Takeaways:
- A Cessna 421B suffered a total loss of engine power and a forced landing after being mistakenly serviced with Jet A fuel instead of the required 100LL aviation fuel, leading to engine detonation.
- The misfueling was attributed to an FBO employee's error, exacerbated by a non-standard smaller Jet A fuel nozzle on the fueling truck that increased the risk of improper fueling.
- Contributing to the accident was the aircraft's non-compliance with an airworthiness directive that mandated fuel filler restrictors, which would have helped prevent the misfueling incident.
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