When repairing braided shield wire, which method is appropriate for holes 50% or less of the harness diameter?

When repairing braided shield wire, which method is appropriate for holes 50% or less of the harness diameter?

• A. Heat shrink tubing
• B. Electrical tape
• C. Self-bonding silicon tape
• D. Solder

Answer: (C)

When a hole in a braided shield harness is small—50% of the harness diameter or less—the best repair is a self-bonding silicone tape wrap. This tape is designed to fuse to itself without relying on an adhesive, so you can build up several layers over the damaged area and it will create a single, seamless, flexible patch. The result seals out moisture and dirt and stands up to vibration and temperature changes, while preserving the harness’s flexibility and integrity. Other methods don’t fit as well here. Heat shrink tubing can be hard to apply neatly around a hole and inside a curving harness, and it may not provide a durable seal in that geometry. Electrical tape is prone to peeling and degradation under aircraft environmental and flexing conditions. Soldering a patch isn’t practical for a flexible shielded bundle and could introduce stiffness or thermal issues. The self-bonding silicone tape hits the right balance of seal, flexibility, and durability for small holes.

When a hole in a braided shield harness is small—50% of the harness diameter or less—the best repair is a self-bonding silicone tape wrap. This tape is designed to fuse to itself without relying on an adhesive, so you can build up several layers over the damaged area and it will create a single, seamless, flexible patch. The result seals out moisture and dirt and stands up to vibration and temperature changes, while preserving the harness’s flexibility and integrity.

Other methods don’t fit as well here. Heat shrink tubing can be hard to apply neatly around a hole and inside a curving harness, and it may not provide a durable seal in that geometry. Electrical tape is prone to peeling and degradation under aircraft environmental and flexing conditions. Soldering a patch isn’t practical for a flexible shielded bundle and could introduce stiffness or thermal issues. The self-bonding silicone tape hits the right balance of seal, flexibility, and durability for small holes.