ENCODER (P/N 428-2003) - As Removed

The 428-2003 is an aircraft encoder that converts static pressure into altitude data for Mode C/S transponder systems. This component interfaces with the aircraft's static plumbing and outputs altitude information via Gillham (Gray) code or serial transmission. Mounted near static system connections, the encoder supplies ATC surveillance systems with accurate pressure-altitude readings required for radar identification and traffic separation.

Installation and testing must comply with 14 CFR 91.215/91.217 regulations and aircraft maintenance manual procedures to ensure data correspondence and proper transponder operation.

What is the ENCODER (P/N 428-2003)?

The 428-2003 is an aircraft encoder that converts static pressure into altitude data for Mode C/S transponder systems. This component interfaces with the aircraft's static plumbing and outputs altitude information via Gillham (Gray) code or serial transmission.

Is the 428-2003 compatible with my aircraft's avionics suite?

Avionics compatibility depends on your aircraft model and existing installation. The ENCODER 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 428-2003 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 428-2003?

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.