KR21 (P/N 066-1021-01) - As Removed, Serviceable

The 066-1021-01 is a BendixKing KR21 marker beacon receiver that detects 75 MHz outer, middle, and inner marker signals during instrument approaches. This avionics component receives signals from the marker beacon antenna and delivers visual and aural cockpit alerts to the flight crew. Operating on 14/28 VDC power, the KR21 interfaces between the marker antenna and the aircraft's audio/annunciator system.

Installed per aircraft avionics manual and TSO-C35d requirements, this receiver is common in general aviation ILS-equipped aircraft such as the Piper PA-28-180. Essential for precision approach navigation.

What is the KR21 (P/N 066-1021-01)?

The 066-1021-01 is a BendixKing KR21 marker beacon receiver that detects 75 MHz outer, middle, and inner marker signals during instrument approaches. This avionics component receives signals from the marker beacon antenna and delivers visual and aural cockpit alerts to the flight crew.

Is the 066-1021-01 compatible with my aircraft's avionics suite?

Avionics compatibility depends on your aircraft model and existing installation. The KR21 is available in: As Removed, Serviceable. We recommend checking your aircraft's wiring diagrams and STC documentation, or contact our avionics team for compatibility assistance.

Does the 066-1021-01 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 066-1021-01?

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.