EASA AD CF-2023-51
Fuel Storage — Fuel Drain Quick Disconnect Valve Leakage Following Impact
Summary
The Airworthiness Directive CF-2023-51 is issued by Transport Canada and applies to Bell Textron Canada Limited model 505 helicopters with specific serial numbers. It addresses a fuel leakage issue from the fuel drain quick disconnect valve following an impact during crash testing. The directive mandates corrective measures to prevent fuel leakage and potential post-impact fire hazards.
What Changed
This new Airworthiness Directive introduces a requirement to install a frangible split plastic grommet around the airframe cut out for the sump drain port fitting. This modification prevents the fuel drain quick disconnect valve from catching on the airframe cut out and reduces the risk of valve deformation and fuel leakage after an impact.
Why It Matters
This directive is critical for aviation professionals because it mitigates the risk of post-impact fuel leakage that could lead to fire and thermal injuries to occupants. Compliance ensures enhanced safety and reduces the likelihood of damage to the fuel system following an accident, thereby improving occupant evacuation time and overall aircraft safety.
What To Do
Operators of affected Bell 505 helicopters must install the split plastic grommet as specified in Bell Alert Service Bulletin 505-21-21. This installation must be completed within six months from the effective date of July 25, 2023, unless already accomplished. Maintenance and compliance teams should follow the approved instructions and document the corrective action accordingly.
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