TRANSFORMER (P/N 129) - As Removed

Part 129 is an aircraft transformer that isolates and steps down AC power for avionics equipment. Operating at 115/200 V, 400 Hz per MIL-STD-704, it conditions power from primary aircraft electrical buses to secondary avionics circuits. The transformer reduces voltage and provides electrical isolation to protect sensitive navigation, communication, and instrumentation systems from transient spikes and ground faults.

Installation requires verification of electrical ratings and mounting configuration against the applicable aircraft maintenance manual before return to service.

What is the TRANSFORMER (P/N 129)?

Part 129 is an aircraft transformer that isolates and steps down AC power for avionics equipment. Operating at 115/200 V, 400 Hz per MIL-STD-704, it conditions power from primary aircraft electrical buses to secondary avionics circuits.

Is the 129 compatible with my aircraft's avionics suite?

Avionics compatibility depends on your aircraft model and existing installation. The TRANSFORMER 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 129 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 129?

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.