
Avionics are the electronic systems that handle communication, navigation, monitoring, and flight management in an aircraft — from panel-mounted radios and transponders to GPS navigators, audio panels, and engine instruments. This category covers avionics units and related hardware for general-aviation aircraft, including equipment from manufacturers such as Garmin, BendixKing, and Icom. Every purchase here is self-serve from start to finish. Use the search bar if you already know the part number, or browse the listings below to compare units by price and availability. If you are not sure whether a unit fits your aircraft, the Aircraft Finder matches parts to your specific make and model using FAA aircraft data, so you can confirm fitment before you buy — no phone calls and no quote requests. Documentation matters in avionics. Where available, eligible items include FAA Form 8130-3 airworthiness documentation; check the individual product listing for the paperwork supplied with each unit. Listings also show condition, so you can tell at a glance whether a unit is new, overhauled, or serviceable.
Manufacturer Part #: MD41-528
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/5V, Horizontal, with Internal Relay. For use with Honeywell KLN-89B/94 models. MD41-528..
$1,564.61
Manufacturer Part #: MD41-1511
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/28V, Vertical. For use with Garmin GTN-650/750 models. MD41-1511MD41 Series Annunciation Control Unit | 28V, Vertical, GarminThe MD41is a compact, self-contained Annunciation and Control Unit (ACU). The fully integrated control unit provides annunciation and mode selection..
$1,043.72
Manufacturer Part #: KITMD41-1418A
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/28V, Vertical, with Remote Relay. For use with Garmin GPS-400/500, GNC-420/520 and GNS-430/530 models. KITMD41-1418AMD41 Series TAWS Annunciation Control Unit | 28V, Vertical, Remote Relay, GarminThe MD41 is a compact, self-contained GPS Annunciation and Control unit. It c..
$1,396.80
Manufacturer Part #: MD41-1498W
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/28V, Vertical, no buttons. For use with Garmin GNS-430/530 and Avidyne IFD-440/540 models. MD41-1498WMD41 Annunciation Unit | 28V, Vertical, GarminThe MD41 is a compact, self-contained GPS Annunciation unit. This unit displays status annunciation received from the compatib..
$844.87
Manufacturer Part #: MD41-1515
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/28V, Vertical, 5V lighting. For use with Garmin GTN-650/750 models. MD41-1515..
$1,043.72
Manufacturer Part #: MD41-1510
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/28V, Horizontal. For use with Garmin GTN-650/750 models. MD41-1510MD41 Series Annunciation Control Unit | 28V, Horizontal, GarminThe MD41is a compact, self-contained Annunciation and Control Unit (ACU). The fully integrated control unit provides annunciation and mode select..
$1,157.21
Manufacturer Part #: MD41-1468A
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/28V, Horizontal. For use with Garmin GNS-430/530 and Avidyne IFD-440/540 models. MD41-1468A..
$1,514.17
Manufacturer Part #: MD-1328
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/28V, Horizontal, with Remote Relay. For use with Honeywell KLN-90B models. MD-1328..
$2,503.57
Manufacturer Part #: MD41-1928
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/28V, Horizontal, with Remote Relay. For use with Honeywell KLN-900 models. MD41-1928..
$0.00
Manufacturer Part #: MD41-1528
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/28V, Horizontal, with Remote Relay. For use with Honeywell KLN-89B/94 models. MD41-1528MD41 Series Annunciation Control Unit | 28V, Horizontal, Honeywell KLN-89B/94The MD41 is a compact, self -contained GPS Annunciation and Control unit. It combines all the necessary funct..
$0.00
Manufacturer Part #: MD41-528
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/28V, Horizontal, with Internal Relay. For use with Honeywell KLN-89B/94 models. MD41-528ANNUNCIATION CONTROL UNIT/28V, Horizontal, with Internal Relay. For use with Honeywell KLN-89B/94 models. Interface and annunciation device that combines navigation source switching to ..
$1,564.61
Manufacturer Part #: MD41-448
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/28V, Horizontal, with Internal Relay. For use with Garmin GPS155XL and GNC300XL models. MD41-448..
$1,713.99
Manufacturer Part #: MD41-428
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/28V, Horizontal, with Internal Relay. For use with Garmin GPS 155 and 165 models. MD41-428..
$1,665.49
Manufacturer Part #: MD41-628
Stock: Warehouse
ANNUNCIATION CONTROL UNIT/28V, Horizontal, with internal relay. For use with FreeFlight (Trimble) 2000 APR and 2101 models. MD41-628ANNUNCIATION CONTROL UNIT/28V, Horizontal, with internal relay. For use with FreeFlight (Trimble) 2000 APR and 2101 models. Interface and annunciation devicethat..
$1,853.99
Manufacturer Part #: MD41-1488W
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/28V, Horizontal, no buttons. For use with Garmin GNS-430/530 and Avidyne IFD-440/540 models. MD41-1488WMD41 Annunciation Unit | 28V, Horizontal, GarminThe MD41 is a compact, self-contained GPS Annunciation unit. This unit displays status annunciation received from the compa..
$873.00
Manufacturer Part #: MD41-1514
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/28V, Horizontal, 5V lighting. For use with Garmin GTN-650/750 models. MD41-1514MD41 Series Annunciation Control Unit | 28V, Horizontal, 5V Lighting, GarminThe MD41is a compact, self-contained Annunciation and Control Unit (ACU). The fully integrated control unit provides an..
$1,157.21
Manufacturer Part #: MD41-1408A
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/28V, Horizontal with Remote Relay. For use with Garmin GPS-400/500, GNC-420/520 and GNS-430/530 models. Includes 1ea. md41-1408a and 1ea. md41-248. MD41-1408AMD41 Series Annunciation Control Unit | 28V, Horizontal, Remote Relay, GarminThe MD41 is a compact, self-contained G..
$1,545.21
Manufacturer Part #: MD41-1628
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/24 Pole Remote Relay, Horizontal, 5V. For use with FreeFlight (Trimble) 2000APR and 2101 models. MD41-1628..
$0.00
Manufacturer Part #: MD41-1628
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/24 Pole Remote Relay, Horizontal, 28V. For use with FreeFlight (Trimble) 2000APR and 2101 models. MD41-1628ANNUNCIATION CONTROL UNIT/24 Pole Remote Relay, Horizontal, 28V. For use with FreeFlight (Trimble) 2000APR and 2101 models...
$0.00
Manufacturer Part #: MD41-1512
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/14V, Horizontal. For use with Garmin GTN-650/750 models. MD41-1512MD41 Series Annunciation Control Unit | 14V, Horizontal, GarminThe MD41is a compact, self-contained Annunciation and Control Unit (ACU). The fully integrated control unit provides annunciation and mode select..
$1,043.72
Manufacturer Part #: MD41-1464A
Stock: Warehouse
ANNUNCIATION CONTROL UNIT/14V, Horizontal. For use with Garmin GNS-430/530 and Avidyne IFD-440/540 models. MD41-1464AMD41 Series Annunciation Control Unit | 14V, Horizontal, GarminThe MD41 is a compact, self -contained GPS Annunciation and Control unit. It meets all requirements for external (remot..
$1,691.99
Manufacturer Part #: MD41-1524
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/14V, Horizontal, with Remote Relay. For use with Honeywell KLN-89B/94 models. MD41-1524..
$0.00
Manufacturer Part #: MD41-524
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/14V, Horizontal, with Internal Relay. For use with Honeywell KLN-89B/94 models. MD41-524ANNUNCIATION CONTROL UNIT/14V, Horizontal, with Internal Relay. For use with Honeywell KLN-89B/94 models. Interface and annunciation devicethat combines navigation source switching ..
$0.00
Manufacturer Part #: MD41-1484W
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/14V, Horizontal, no buttons. For use with Garmin GNS-430/530 and Avidyne IFD-440/540 models. MD41-1484WMD41 Annunciation Unit | 14V, Horizontal, GarminThe MD41 is a compact, self-contained GPS Annunciation unit. This unit displays status annunciation received from the comp..
$934.11
Manufacturer Part #: MD41-444
Stock: Out of Stock - On Backorder
ANNUNCIATION CONTROL UNIT/14V Horizontal, with Internal Relay. For use with Garmin GPS155XL and GNC300XL models. MD41-444ANNUNCIATION CONTROL UNIT/14V Horizontal, with Internal Relay. For use with Garmin GPS155XL and GNC300XL models. ACU for Garmin: GPS 155XL/GNC300(XL).Horizontal14VInternal RelayP..
$1,713.99























