TUNING UNIT, COMM/NAV RTU (P/N 822-1121-002) - Serviceable

The 822-1121-002 is a VHF communication and navigation tuning unit (RTU) that serves as the flight crew interface for frequency selection. This line-replaceable unit (LRU) enables active and standby frequency management for COMM/NAV radios, interfacing with remote radio systems or flight management systems via ARINC 429 protocol. Installed in the cockpit instrument panel, the tuning unit allows pilots to select and transfer frequencies for VHF communication, VOR, LOC, and ILS navigation.

Configuration and testing follow aircraft-specific avionics installation and maintenance manual requirements.

What is the TUNING UNIT, COMM/NAV RTU (P/N 822-1121-002)?

The 822-1121-002 is a VHF communication and navigation tuning unit (RTU) that serves as the flight crew interface for frequency selection. This line-replaceable unit (LRU) enables active and standby frequency management for COMM/NAV radios, interfacing with remote radio systems or flight management systems via ARINC 429 protocol.

Is the 822-1121-002 compatible with my aircraft's avionics suite?

Avionics compatibility depends on your aircraft model and existing installation. The TUNING UNIT, COMM/NAV RTU 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 822-1121-002 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 822-1121-002?

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.