Beech C90A King Air
Worn Fuel Cap
The crew noticed fuel leaking from the right hand outboard fuel cap. Aircraft returned and the fuel cap was replaced with a new one. The aircraft has since flown 4.9 hours with no defects noted.
Fuel Cap Failures
The following is derived from maintenance facility submissions to the FAA’s Service Difficulty Reports database.
Key Takeaways:
- Aircraft fuel caps are prone to various defects, including wear, deteriorated gaskets, broken components, or manufacturing flaws, often resulting in fuel leaks or siphoning.
- Improperly secured or missing fuel caps present significant safety hazards, capable of causing substantial fuel loss and leading to engine failure in flight.
- Problems with fuel cap ventilation, such as plugged vents, can lead to fuel siphoning and negatively impact engine performance during operation.
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