parts require mandatory replacement at overhaul or due to Service Bulletins or
are visually inspected for damage, corrosion, and defects. Depending on the
part, some damage and corrosion can be worked out. Parts are then dimensionally
width, thickness, angles, and face alignment are
checked at various blade stations. If the face
alignment (the fore and aft bend) or angles (twist)
of the blade are out of manufacturer's requirements,
it is corrected at this time. This is a time
consuming job, but when done correctly, will aide in
making a smoother flying propeller.
the parts have passed the visual inspections, they move on to NDT or Non Destructive Testing.
The following methods are used for finding cracks and
other defects. We use three forms of NDT- Eddy Current, Dye Penetrate, and