011-01257-20

Garmin GMA 1347D Cabin unit 011-01257-20

011-01257-20 identifies the Garmin GMA 1347D Cabin audio control panel offered in this product card. Garmin distinguishes this exact Cabin configuration from the 011-01257-00 GMA 1347D unit, so the complete Manufacturer Part Number must be checked when ordering. The panel integrates audio selection, intercom controls and marker beacon functions within an approved Garmin G1000 installation.

The GMA 1347D is normally installed in the instrument panel and works as the crew interface to connected communications radios, navigation receivers, passenger-address equipment, intercom stations and selected auxiliary audio sources. It is not a self-contained radio. Its functions depend on the approved harness, connected equipment, antenna installation and aircraft-specific configuration loaded through the G1000 system.

Cockpit audio selection and crew controls

The front panel provides separate transmitter selection for COM1, COM2 and COM3 and corresponding receiver-audio selection. Dedicated controls are provided for NAV1, NAV2, DME, ADF, auxiliary audio, music, speaker, telephone and passenger address when those sources are installed and enabled. The knob arrangement supports master audio and intercom volume or squelch adjustment.

The exact 011-01257-20 Cabin version includes cabin and intercom functionality appropriate to its approved configuration. Garmin documentation lists up to five intercom positions for the GMA 1347D, with separate pilot and passenger volume control paths. It also provides manual squelch, cabin intercom and playback controls. Actual passenger stations and jacks are external installation items and are not included merely because the panel supports them.

Marker beacon, recording and fail-safe functions

The GMA 1347D incorporates marker beacon controls, including marker mute and sensitivity selection. A compliant installation requires the appropriate marker beacon antenna, coupler, coaxial cable and approved routing. Garmin lists the antenna kit separately, and the antenna is mounted outside the aircraft in accordance with the installation requirements rather than inside the cabin.

The panel supports digital recording playback and includes fail-safe audio behavior for essential communication paths. The red DISPLAY BACKUP control is used for the applicable reversionary display function in an integrated cockpit. These controls must be interpreted according to the aircraft flight manual supplement and system documentation; a visible button does not prove that every optional mode is enabled in a particular aircraft.

Electrical, interface and installation data

The GMA 1347D requires a 28 V DC supply and draws no more than 1.75 A at 27.5 V. Garmin specifies an operating temperature range from −45 °C to +70 °C and an altitude qualification of 55,000 ft. The audio architecture provides three transceiver inputs, five receiver inputs and four unswitched inputs, with 500-ohm input impedance and at least 60 dB input isolation.

The panel uses two 78-pin rear connectors, identified as J3471 and J3472. Its bezel measures 7.70 in (196 mm) high and 1.30 in (33 mm) wide; the rack is 6.30 in (160 mm) high and 1.325 in (34 mm) wide. Depth behind the aircraft panel, including connector backshells, is 7.79 in (198 mm). Unit mass is 1.7 lb (0.8 kg), increasing to 2.4 lb (1.1 kg) with rack and connectors.

Condition and ordering of 011-01257-20

This 011-01257-20 GMA 1347D Cabin position is offered in Serviceable condition from partner stock with a six-month warranty. Price follows the matching public comparison and agreed minimum multiplier. The exact serial number, traceability, software or modification level, supplied release documentation and included installation hardware are reconfirmed before order acceptance.

For a quotation, specify MPN 011-01257-20, model GMA 1347D Cabin, quantity, destination and certification requirements. Confirm the required rack, connector kit, backplate, marker antenna equipment and aircraft approval. The installation should also be checked for panel space, rear support, cooling airflow, electrical bonding and the approved relationship between the audio panel and both integrated avionics units. Other identified units appear in the Garmin / BendixKing / Honeywell / Collins category. They are related catalog positions and must not be treated as interchangeable without approved data.

Product Type: Integrated audio control panel / marker beacon and intercom control unit

Manufacturer: Garmin

Model: GMA 1347D Cabin

Designation: 011-01257-20

Alternative Designations: Garmin GMA 1347D; GMA1347D Cabin; 0110125720

Main Function: Communications and navigation audio selection, intercom control, marker beacon control and audio playback

System: Compatible Garmin G1000 integrated avionics installation

Transceiver Inputs: 3

Receiver Inputs: 5

Unswitched Inputs: 4

Intercom Positions: Up to 5, consisting of pilot and four passenger positions according to installation

Volume Controls: 2, pilot and passenger paths

Input Impedance: 500 Ω

Input Isolation: 60 dB minimum

Power Supply: 28 V DC

Maximum Operating Current: 1.75 A at 27.5 V

Operating Temperature Range: −45 °C to +70 °C

Qualified Altitude: 55,000 ft

Connectors: Two 78-pin rear connectors, J3471 and J3472

Bezel Dimensions: 7.70 in H × 1.30 in W (196 × 33 mm)

Rack Dimensions: 6.30 in H × 1.325 in W (160 × 34 mm)

Depth Behind Panel with Connectors: 7.79 in (198 mm)

Unit Weight: 1.7 lb (0.8 kg)

Installed Weight with Rack and Connectors: 2.4 lb (1.1 kg)

Environmental Compliance: RTCA/DO-160D and EUROCAE/ED-14D

Condition: Serviceable

Warranty: 6 Months

Delivery Set: Exact included rack, backplate, connector kit, marker beacon accessories and documentation to be confirmed in the quotation

Technical Documentation: Garmin GMA 1347D Installation Manual 190-00303-21 and aircraft-approved installation data

All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.

In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.

Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.

Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.