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Oil filter
Maintaining Your AirplaneThe First Rule of Maintaining Your Airplane
Cutting open your oil filter can reveal problems early and prevent surprises during your next inspection.
Richard Scarbrough![](https://www.flyingmag.com/uploads/2023/02/IMG_1104-courtesy-R-Scarbrough-scaled-e1676574213957.jpg?auto=webp&auto=webp&optimize=high&quality=70&width=1440)
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