Technical training
Blade Repair Standard / V4 2023-05-02
Structural adhesive
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Filler
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Gelcoat
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• Paint Repair stage 1
Preparation Gather all documentation, tools and materials that are required for the inspection and repair task. Assessment and damage removal 1) Photograph the initial damage, making sure to include a scale in the photographs to indicate the size of the damage. Make a note of any relevant observations that might indicate the root cause of the damage 2) Perform a tap test around the damage to identify the extent of underlying delamination. Mark this extent on the blade surface.
If the laminate has been in prolonged contact with water, it must be dried before repair activities are commenced.
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3) Carefully remove all the damaged material, taking care to not damage underlying structural elements like spar caps. 4) Assess the size of the repair needed, taking into consideration the overlaps required for each layer of laminate and the size of the core material (if required).
During removal of the damaged material, it may be found that the repair size exceeds the ability of the technician performing the repair. In this case, work should stop and the OEM contacted for advice on how to proceed.
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5) Carefully grind the existing laminate around the area being repaired, to create overlaps in each layer of laminate being repaired. 6) Clean the repair area with a cleaning agent, ensuring that you remove all dust, debris and oils Repair stage 2 Preparation 1) Measure the extent of the overlaps and the removed core material created above. Use these measurements to carefully cut and shape the repair pieces as required, taking care to ensure the correct fibre orientation for each repair layer.
A fundamental principle of fibre-reinforced composite repair work is that you should replace what you take out. This applies in the case of blade repair work, but you should consult the OEM specific repair instructions and or blade drawings to identify which materials to use for the repair task.
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