Appendix 1 Propeller, Reversing. A propeller in which blades can be rotated to a negative blade angle where they will provide a rearward thrust to slow down, stop, or move the aircraft backward.
Propeller. A device for propelling an aircraft that has blades on an engine-driven shaft and that, when rotated, produces by its action on the air, a thrust approximately perpendicular to its plane of rotation. It includes associated control components normally supplied by its manufacturer.
Reconditioning. The repair of major or minor blade damage caused by erosion or striking small objects during normal operation. Reconditioning consists of penetrant inspection, refinishing, and rebalancing. It is accomplished on an irregular basis as necessary and required.
Repair. The correction, on an irregular basis as necessary, of minor or major damage caused by a physical mishap. The amount, degree, and extent of damage determine whether the propeller can be repaired as a minor repair in the field by a mechanic.
Score. Groove-like indentations from rubbing by a hard, rough surface. See “Gouge.”
Shank. The portion of the blade from the butt face to the first blade station.
Stations. Locations perpendicular to the blade center line at which dimensions are checked.
Tip. The portion of the blade outermost from the axis of propeller rotation.
Tracking. See “Blade Track.”
Trailing Edge. The rear edge of the blade where the air leaves the blade.
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