Maintenance Matters

October 2018 Issue

Prop Inspections: More Than Surface Flaws

There are good reasons why the FAA is serious about propeller maintenance. Performing the right inspections and repairs is key to long service life.

A propeller and its systems are more complex (and critical) than you might realize, evident by the detailed inspection procedures prescribed by the prop manufacturer. The good news is there is a lot of inspecting that can be done without even removing the blades from the aircraft. The FAAs advisory circular AC 20-37E is worth a read as it provides guidance for aircraft propeller maintenance. In particular, the AC provides information and suggests procedures to both increase service life and to minimize failures of metal propellers. Wood and composite props generally follow different repair guidance.

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