011-00779-10

Garmin GTX 33 remote transponder 011-00779-10

011-00779-10 is the exact Part Number for this Garmin GTX 33 remote-mounted Mode S transponder. Unlike a panel radio with its own keypad and display, the GTX 33 is installed away from the pilot and controlled by compatible integrated avionics. The unit supplies transponder reply functions while the crew selects codes, modes and IDENT through the approved cockpit display or control interface.

The exact identification plate on the photographed unit states GTX 33, P/N 011-00779-10 and 14/28 VDC. It also carries TSO C112, DO-160D and DO-178B Level D references. These markings provide positive identification for the exact suffix. They should be matched with the release certificate, serial number, modification status and aircraft equipment records before the transponder is accepted for installation.

Remote Mode S operation in an integrated suite

In service, the GTX 33 receives interrogation signals through the aircraft transponder antenna and produces Mode A, altitude-reporting and Mode S replies according to the configured installation. The crew interface normally resides in an integrated Garmin display system rather than on the transponder enclosure. This arrangement reduces panel space while keeping the surveillance hardware accessible in a remote avionics location.

A typical functional chain is crew command from the compatible display, configuration and altitude data through the avionics network, reply processing in the GTX 33, and radio-frequency transmission through the approved antenna and coaxial cable. The altitude source, control display, antenna, rack and wiring are associated equipment and are not included with this unit unless specifically listed in the quotation.

Exact -10 standard and Extended Squitter distinction

The 011-00779-10 configuration must not be described automatically as a GTX 33ES. Garmin service information distinguishes this standard GTX 33 Part Number from Extended Squitter configurations and indicates that the -10 hardware requires an approved upgrade before the ES option can be enabled. This difference is operationally important because outwardly similar remote boxes may carry different approval and surveillance capabilities.

When replacing or upgrading equipment, maintenance personnel should verify the full Part Number, software and hardware status, aircraft approval and intended ADS-B architecture. A GTX 33ES or another suffix is not automatically a direct substitute for 011-00779-10. Conversely, the standard -10 unit should not be represented as meeting an ES requirement unless the approved modification and configuration records confirm it.

Installation, inspection and bench testing

The label confirms compatibility with 14- or 28-volt aircraft electrical systems, but the actual installation must use the correct rack, connector, circuit protection, altitude source, data interface and antenna arrangement. Cooling, bonding and coaxial-cable loss should be checked against current Garmin instructions. A transponder fault can be caused by the integrated display, configuration data, altitude encoder, antenna or wiring as well as by the LRU itself.

Receiving inspection should cover the exact 011-00779-10 plate, serial number, connector contacts, mounting rails, enclosure, evidence of moisture and unauthorized repairs. An approved bench procedure should confirm power-up, control communication, code and mode response, altitude reporting, IDENT, receiver sensitivity, transmitter frequency and output power. Aircraft return-to-service tests remain required after installation.

Serviceable supply and ordering information

This 011-00779-10 GTX 33 is offered in Serviceable condition from partner stock with a six-month warranty. Because the exact source photograph provides the clearest identification evidence, the catalog images preserve the original label and real enclosure rather than replacing its technical markings with generated text. The pictured serial number documents the reference unit only and should be confirmed before serial-specific supply.

For an inquiry, specify Part Number 011-00779-10, model GTX 33, aircraft type, integrated display system, bus voltage, required surveillance capability, modification status, documentation and quantity. Related surveillance and integrated-avionics products can be reviewed in the Garmin / BendixKing / Honeywell / Collins category. Related equipment is not automatically interchangeable.

Product Type: Remote-mounted Mode S transponder

Manufacturer: Garmin

Model: GTX 33

Designation: 011-00779-10

Alternative Designations: GTX33; GTX-33; 0110077910; Garmin GTX 33

Main Function: Remote Mode A, altitude-reporting and Mode S transponder replies

Cockpit Control: Compatible integrated Garmin display or approved control interface

DC Power According to Plate: 14/28 VDC

Qualification According to Plate: TSO C112

Environmental Reference: DO-160D

Software Reference: DO-178B Level D

Extended Squitter Status: Do not assume ES capability for the standard -10 configuration

Upgrade Note: Approved upgrade required before enabling GTX 33 ES functionality

Typical Signal Chain: Integrated display / altitude data → GTX 33 → transponder antenna

Installation Area: Approved remote avionics equipment location

Associated Equipment: Display, altitude source, rack, connector, antenna and coaxial cable

Exact Dimensions and Weight: Confirm from the applicable GTX 33 installation data

Connector Type: Aircraft-system connector on the remote LRU

Aircraft Applicability: Confirm from the approved equipment list and installation manual

Interchangeability: Verify suffix, ES status, software, rack, wiring and aircraft approval

Condition: Serviceable

Warranty: 6 Months

Technical Documentation: Applicable Garmin GTX 33 installation, configuration and maintenance data

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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.