If blade root slot wear is within limits, what is the recommended approach to restoration?

• A. Replace the blade entirely regardless of wear.
• B. Slot repair or replacement per OEM guidelines; reaming, welding or coating film application; typically replacement if wear exceeds limits.
• C. Grinding the slots to remove wear without replacement.
• D. Ignoring wear and continuing operation.

Answer: (B)

When blade root slot wear is within limits, restoration should follow OEM guidelines rather than replacing the blade as a default. The recommended approach is slot repair or replacement per the manufacturer’s procedures, using approved methods such as reaming to restore slot size, welding to rebuild worn areas, or applying a coating film to protect surfaces and regain proper fit. Replacement is typically reserved for wear that exceeds limits or cannot be repaired to spec. This keeps the blade’s geometry, rigidity, and balance intact while avoiding unnecessary part replacement. Grinding the slots to remove wear is generally not acceptable in many OEM processes, as it can thin walls or alter tolerances beyond what the design allows. Ignoring wear or continuing operation would risk failure and violate maintenance standards.