SWITCH, PROXIMITY (P/N 8-405-04) - Serviceable

The 8-405-04 is a proximity switch for non-contact position sensing in aircraft airframe mechanisms. Operating at 24 VDC, this switch detects landing gear position without mechanical contact, providing reliable indication to flight deck instruments and control systems. Commonly installed on Bombardier Challenger 600-series aircraft for gear-up/gear-down status monitoring.

The switch mounts to structural components near movable surfaces and transmits position data through aircraft wiring to the flight management system. Installation requires verification in the aircraft Illustrated Parts Catalog and integration per maintenance manual wiring diagrams.

What is the SWITCH, PROXIMITY (P/N 8-405-04)?

The 8-405-04 is a proximity switch for non-contact position sensing in aircraft airframe mechanisms. Operating at 24 VDC, this switch detects landing gear position without mechanical contact, providing reliable indication to flight deck instruments and control systems.

Is the 8-405-04 compatible with my aircraft's avionics suite?

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

Does the 8-405-04 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 8-405-04?

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.