SWITCH SP (P/N 305538-3) - As Removed

The 305538-3 is an aircraft speed switch that monitors engine or accessory rotational speed and triggers electrical circuits at predetermined RPM setpoints. This Honeywell-manufactured component enables or disables engine control functions, fuel flow management, and accessory operation based on shaft speed feedback. Installed in engine control circuits, the switch actuates when rotation reaches the calibrated threshold, cutting power or activating systems as required.

Installation and calibration must follow the aircraft maintenance manual and FAA AC 43.13-1B standards to ensure proper setpoint accuracy and reliable operation during flight.

What is the SWITCH SP (P/N 305538-3)?

The 305538-3 is an aircraft speed switch that monitors engine or accessory rotational speed and triggers electrical circuits at predetermined RPM setpoints. This Honeywell-manufactured component enables or disables engine control functions, fuel flow management, and accessory operation based on shaft speed feedback.

Is the 305538-3 compatible with my aircraft's avionics suite?

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

Does the 305538-3 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 305538-3?

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.