Replacing Your KX 155 with the New KX 200: A Closer Look at the Honeywell KX 200

If you're dealing with an aging KX 155 unit in your aircraft, you're not alone. Many aviators are finding it increasingly difficult to source replacement parts for these older models, and the cost of repairs is on the rise. Fortunately, there's a straightforward solution that will be available soon. The new Honeywell KX 200 radio is a drop-in replacement for the KX 155.

The Honeywell KX 200 is a navigation and communication system developed to meet the practical needs of today’s pilots. This compact unit reduces cockpit clutter and streamlines operations. The KX 200 also provides dependable performance for a range of aircraft, from small private planes to commercial jets.

Important Note: Only an FAA licensed mechanic (A&P) can perform the removal of the KX 155 and the installation of the KX 200.

1. Power Down and Remove the KX 155
   Start by cutting power to your unit. Then, unscrew and remove the old KX 155 from its tray connector. Using a 3/32” Allen wrench, turn the locking screw counterclockwise until the KX 155 disconnects from the mounting rack. Pull on the metal tabs located behind the front panel on each side of the KX 155 and pull it out of the mounting rack.
2. Prepare the KX 200
   The KX 200 comes with a special adapter plate that allows it to fit directly into the existing slot. This adapter accommodates both 14-volt and 28-volt systems, so you'll need to specify your voltage when ordering. The unit itself is versatile, with a voltage range of 11 to 32 volts.
3. Install the KX 200
   Once the old unit is removed, make sure the front lobe of the hold-down device is in vertical position. Slide the KX 200 into place until the front lobe touches the mounting rack. Then, using the Allen wrench, engage the locking screws through the hole in the front panel. Turn the screen clockwise until the rear lobe engages with the mounting rack. Continue turning until the unit is secure. Do not overtighten. Once the KX 200 is in place, reconnect the power. The KX 200 is designed to integrate with your current setup, including glideslope functionality, if your aircraft is equipped with it.
4. Power Up and Test
   After installation, apply power to the unit. The KX 200 should power up immediately, and you can start familiarizing yourself with its features. The interface is user-friendly, with push-and-turn controls.
   
   Once the A&P mechanic has installed your new unit, they will complete a logbook entry. You do not need to obtain a Supplemental Type Certificate (STC).
   If you have any questions or need further assistance, our Mid-Continent Instruments and Avionics Field Service Engineers are available to help.

The Honeywell KX 200 includes dual VOR receivers, enabling you to monitor two navigation stations at the same time. This can be especially helpful in complex airspaces, where precise course tracking is essential.

For navigating in low-visibility conditions, the KX 200 offers ILS capability. This feature supports precision approaches, helping guide you safely to the runway even when visibility is reduced.

The KX 200 is built to be both compact and lightweight, making it a space-efficient choice for aircraft with limited cockpit space, without compromising on performance.

The KX 200 is designed with ease of use in mind. Its controls are intuitive, and the display is clear and readable in various lighting conditions, which is important during critical moments in flight. The radio also features 50-channel memory presets with 25kh or 8.33kh channel spacing.

The KX 200 integrates navigation and communication into one system, helping to reduce errors during critical flight phases. This design allows pilots to focus on safely and efficiently flying the aircraft. The radio is also built to be durable and handle the demands of aviation, as it performs consistently in all kinds of conditions, making it a dependable tool for navigating busy skies.

The KX 200 is a drop-in replacement for the well-known KX 155. Upgrading to the KX 200 is not only a practical solution, but also a way to ensure that your aircraft's avionics remain reliable and efficient. With this new system in place, you can fly with confidence, knowing that your equipment is up-to-date and fully functional.

Honeywell is planning to introduce the KX 200 at the end of 2024. Mid-Continent Instruments and Avionics will be among the first to receive new units. If you would like to be notified when the KX 200 is available, please contact us.

If you are not planning to upgrade to the new KX 200, Mid-Continent Instruments and Avionics is an Authorized Repair Partner, delivering expert service and support for the KX 155 VHF Comm/NAV Transceiver. Have questions? Contact us.