INSULATOR (P/N sk421-114) - New Surplus

The sk421-114 is a nonconductive insulator that electrically isolates aircraft wiring and hardware from structural members. This component prevents chafing damage and eliminates arcing risks at structural pass-throughs where conductors contact metal edges. Typically fabricated from rubber or composite material, the insulator separates electrical lines from fuselage, wing, or control surface structures during installation.

Selection and placement follow FAA AC 43.13-1B guidance, with compatibility verified against the aircraft's Illustrated Parts Catalog before use.

What is the INSULATOR (P/N sk421-114)?

The sk421-114 is a nonconductive insulator that electrically isolates aircraft wiring and hardware from structural members. This component prevents chafing damage and eliminates arcing risks at structural pass-throughs where conductors contact metal edges.

Is the sk421-114 compatible with my aircraft's avionics suite?

Avionics compatibility depends on your aircraft model and existing installation. The INSULATOR is available in: New Surplus. We recommend checking your aircraft's wiring diagrams and STC documentation, or contact our avionics team for compatibility assistance.

Does the sk421-114 come with an 8130-3 airworthiness tag?

Availability of an FAA 8130-3 tag depends on the part condition. Overhauled and repaired units typically include 8130-3 documentation. As-removed units may include a removal tag with trace history. Contact us for specific documentation on the condition you need.

Do you offer bench testing for the sk421-114?

We can arrange bench testing through our network of FAA-certified repair stations. Call (904) 998-9101 for testing availability and turnaround times, or submit an RFQ with your specific requirements.