Which routing guideline ensures proper positioning of wire bundles in relation to ribs?

Which routing guideline ensures proper positioning of wire bundles in relation to ribs?

• A. Keep bundles perpendicular to ribs
• B. Wrap bundles around components
• C. Bundle angles at parallel or right angles to the aircraft rib structure
• D. Avoid bends in bundles

Answer: (C)

Routing wire bundles with respect to the rib structure is about choosing bend directions that respect the ribs so the installation remains reliable under vibration and maintenance checks. When bundle angles are made parallel to the rib lines or at right angles to them, the wires follow a predictable path along the structural members, which keeps bends smooth, allows clamps and ties to be placed at regular rib bays, and reduces sharp turns that could create fatigue, chafing, or interference with fittings. This alignment also makes it easier to maintain proper bend radii and clearance from adjacent components, so the wiring stays secure over time. Routing perpendicular to the ribs can force abrupt changes in direction and increase the risk of contact with edge surfaces or other parts, while wrapping around components or avoiding bends altogether ignores how the bundles must navigate the airframe, leading to potential damage or maintenance issues.

Routing wire bundles with respect to the rib structure is about choosing bend directions that respect the ribs so the installation remains reliable under vibration and maintenance checks. When bundle angles are made parallel to the rib lines or at right angles to them, the wires follow a predictable path along the structural members, which keeps bends smooth, allows clamps and ties to be placed at regular rib bays, and reduces sharp turns that could create fatigue, chafing, or interference with fittings. This alignment also makes it easier to maintain proper bend radii and clearance from adjacent components, so the wiring stays secure over time. Routing perpendicular to the ribs can force abrupt changes in direction and increase the risk of contact with edge surfaces or other parts, while wrapping around components or avoiding bends altogether ignores how the bundles must navigate the airframe, leading to potential damage or maintenance issues.