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Edition – Rev 0
51-20
DAMAGE CLASSIFICATION AND REPAIRS – MAINTENANCE PRACTICES
2. COMPOSITE STRUCTURAL COMPONENTS: CRACKS
STOPPING
If the cracks are small (less than 25 mm), stopping them with drilled holes will usually
suffice until replacement can be made.
At the first sign of crack development, drill a small hole with a 1/8-inch drill at the
extreme ends of the cracks as shown in figure below.
This allows to localize the cracks and to prevent further splitting by distributing the
strain over a large area.
Apply sealant type 2 (see Chapter 51-30) if required to prevent moisture from entering
the material.