FAA Powerplant Written Practice Test

How should splicing of individual aircraft electrical wires be done?

1. All wires should be spliced together in a single large bundle

2. Must be staggered to avoid excessively large bundles

3. Wires should not be spliced at all

4. Wires should be spliced only when necessary

The correct answer is: Must be staggered to avoid excessively large bundles

Splicing of individual aircraft electrical wires should be done in a staggered manner to prevent the formation of excessively large bundles. When wires are spliced together indiscriminately into a single large bundle, it can lead to increased bulk, difficulty in managing the wiring, and potential interference in the electrical signals. Additionally, large bundles can create heat concentration areas, leading to insulation deterioration and increased chances of shorts or failures. Staggering the splices allows for a more manageable and organized wiring harness, which not only enhances maintenance capability but also improves safety by reducing the risk of electrical faults. This method aids in preserving the integrity of the electrical system, facilitating easier troubleshooting, and ultimately ensuring the reliability of the aircraft's electrical operations.