Mandatory
AircraftMandatory Service Bulletin Issued for Superior Millennium Cylinders
Three engine models are included in the required intake valve replacement.
Meg Godlewski![](https://www.flyingmag.com/uploads/2022/12/shutterstock_1826845217-scaled-e1670945294617.jpg?auto=webp&auto=webp&optimize=high&quality=70&width=1440)
![](https://www.flyingmag.com/uploads/2022/09/Pilot-and-copilot_adobe-stock-rs.jpg?auto=webp&auto=webp&optimize=high&quality=70&width=1440)
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