Q&A
Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.
Q: What is in the box for the Garmin GDL 82 Built In GPS Kit including WAAS? What additional items will I need to purchase to install?
The box comes with the GDL 82, GA 35 WAAS GPS and the installation kit. You will still need coax cables from the GDL 82 to the transponder antenna and the unit to the WAAS GPS antenna. You will also need wire to draw up the wire harness for the unit.
Q: Will the GDL 82 be able to display TIS-B and FIB-B onto an Aera 660 through a cable like the GDL 39 does?
No. The GDL 82 is only an ADS-B out unit. It does not perform ADS-B in functions.
Q: Does the Garmin GDL 82 Built In GPS Kit including WAAS include the WAAS GPS antenna?
Yes, this kit comes with the Garmin GA 35 WAAS antenna.
Q: Is the Garmin GDL 82 compatible with KT76A?
Yes, it is. Though you will want to get a transponder test to make sure your unit is operating properly.
Q: Does the GDL-82 unit need to be turned on AFTER the transponder is turned on? Can I turn on this unit BEFORE turning on the transponder?
The GDL 82 powers on with the aircraft.
Q: I have a non waas Garmin 430 and a Garmin 327 Transponder---will I be able to utilize these units with the GDL-82?
Yes. The gdl-82 will interface with the 327 antenna output to make the signal compliant.
Q: Looking at pics, I will need a female-female BNC cable from GDL-82 to transponder antennae. I know its BNC for the GPS antennae at the GDL-82 end. Is the GPS antennae have an MCX or BNC connector on it?
You will need a BNC male to BNC male cable. BNC connectors are based on the inner pin, not the housing. The GA 35 WAAS GPS antenna has a TNC female antenna connector on it.
Q: Will this Garmin GDL 82 work with an older Mode C such as a Collins TDR 850 or an analog King?
Yes. Per Garmin, this unit will work with any mode C transponder that is in good working condition. A transponder test is recommended to ensure that the unit is operating properly.
Q: Is the Garmin GDL 82 compatible with a Becker transponder?
Yes, it is.
Q: I have a G3X and G5 and both have WAAS GPS antennas, with a GTX327 transponder. Do i need to install yet another GPS antenna or can it use the CANBUS from the G3X or G5 to get a position source to the Garmin GDL 82?
You will need a GPS 20A with a connector kit and a GA 35 antenna. This unit can give GPS info to the G5 without having to buy a second antenna for the G5.
Q: Will the Garmin GDL 82 work with the Sandia Aero Space mode c stx 165 transponder?
Yes, it will.
Q: Will the Garmin GDL 82 work with a KT78 transponder?
Yes. Per Garmin, this unit will work with any mode C transponder that is in good working condition.
Q: Will the Garmin GDL 82 work with the Narco AT150?
Yes. Per the manufacturer, the GDL82 has been tested with the AT150 with no issues. The AT150 should pass a transponder test to ensure that it is functioning properly.
Q: Will the Garmin GDL 82 work with the NARCO AT165 transponder?
Per the manufacturer, it should function although a transponder test is recommended to ensure that your unit is operating properly.
Q: Will the Garmin GDL 82 work with a Garmin GTX320 transponder?
Yes. Per Garmin, this unit will work with any mode C transponder that is in good working condition. A transponder test is recommended to ensure that the unit is operating properly.
Q: Would a Garmin GTX320A have the same answer as a GTX320?
Yes, both cannot be guaranteed.
Q: I have a GNS 530W. Can I use the existing GPS signal for the 530W to drive the GDL82 position as well , or do I need to install a second GPS antenna?
Yes, the GDL 82 will accept GPS data from an existing GNS 400W/500W series. No second GPS antenna is needed.
Q: How do you go about setting up the GDL-82 to input your tail number and/or the ICAO code for your aircraft?
Configuration of the GDL 82 has to be done via USB connection and computer, this would include inputting your iICAO code.
Q: Will the GPS signal from a KLN90B drive the GDL82 without a second GPS antenna required?
Per Garmin, the only compatible GPS data sources are the GTN 6XX/7XX, GNS 4XXw/5XXW, or the GNS 480. The included GA 35 WAAS GPS Antenna would need to be installed.
Q: Please supply the dimensions of the GPS antenna included with the Garmin GDL 82 kit?
Approx Dims: 4.68 x 3.00 x 0.81 inches.
Q: Does the GDL 82 come with all TSO certificates needed for legal installation & complete install and hook-up directions manual?
The GDL 82 is a TSO ADS-B out solution that comes with the unit, rack, connector kit and GPS antenna. You can contact our avionics sales department for a PDF copy of the manual but it will be posted on Garmin's website soon.
Q: I have a Garmin G5 installed in my PA24-250. Can you use the GA 35 WAAS antenna that comes with the GDL 82 as a GPS source for the G5? If yes can the signal be split or is other equipment required?
The antenna coax cannot be split but you can run a RS-232 lead from the GDL 82 to the G5 to share the GA 35 WAAS information.
Q: Has the Garmin GDL-82 received final approval for installation from the FAA, the Garmin website does not make that clear?
The Garmin GDL 82 has not yet received final approval. The units will be shipping as soon as that is complete, which is expected this month.
Q: Will the Garmin GDL 82 provide a WAAS GPS source to other devices?
Yes. That is the plan for the GDL 82. To provide this GPS information to other devices via a RS-232 input.
Q: What does the 10 harness option include? Just a 10ft power/ground cable, or the required GPS Antenna to GDL82 cable, and Transponder Antenna to GDL82 cable as well.
The GDL82 harness includes - power/ground, RS232, USB dongle, anonymous mode, and squat switch provisions. It does not include an antenna cable.
Q: Is the Garmin GDL 82 compatible with the King KT76A?
Thanks
Yes.
Q: Does the Garmin GDL 82 Built In GPS Kit including WAAS work with my GTX 330?
No, this cannot be installed with a Mode S transponder.
Q: I have a 406 mhz ELT installed. Is the ICAO code required for Garmin GDL-82 ADS-B Out the same code as the ICAO SARSAT code for Search & Rescue in the ELT?
Yes, the ICAO code for your aircraft is a set registration number. For U.S. based aircraft, the GDL 82 install tool will automatically compute your ICAO address based upon your registered tail number. For international aircraft, your ICAO code can be obtained from your aircraft registration authority.
Q: I visited the Garmin booth at NBAA in Las Vegas 2017 and salesman said that it could be installed by an A&P mechanic and not have to go through an avionics shop and be certified/legal. I dont see any mention of that. Is that still the case?
The GDL 82 can be installed by an A&P, and does not require purchase or installation through an avionics shop. The A&P must be able to test the transponder to verify the installation.
Q: May I purchase the harness now and the GDL 82 kit later? Is it available now? Price?
The GDL 82 harness is made from some of the components included in the GDL 82 kit, so we do not sell it off the shelf currently. We can special order one for you, please contact our sales department for price quote and lead time.
Q: Regarding Garmin GDL 82: Is the 10-foot harness for this device fabricated by Aircraft Spruce, or does it have a Garmin part number?
The 10 foot harness is fabricated by the Aircraft Spruce harness shop.
Q: Is the GDL 82 compatible with the Becker Transponder mdl ATC 4401-1-175 mode c unit?
Yes. Per Garmin, this unit will work with any mode C transponder that is in good working condition. A transponder test is recommended to ensure that the unit is operating properly.
Q: Can this GDL 82 unit be installed by my AP/IA or does it have to be installed by an avionics shop? This is for a certified aircraft
Yes. This unit can be sold to both experimental and certified aircraft and it can be installed by an A&P.
Q: Will the GDL 82 commicate to my ipad so I can receive weather and traffic?
No. The GDL 82 is only an ADS-B out unit. It does not perform ADS-B in functions and does not have any wireless capabilities. You would still need the GDL 39 or GDL 52 for ADS-B streaming to an iPad.
Q: Does the Garmin GDL82 installation kit include the required Airspeed/Squat switch and the USB harness and plug?
The USB harness and plug is provided but, the user must supply the squat/airspeed switch.
Q: Can I use the GDL82 GPS for a source to feed the Garmin GTR-225?
According to the manual, the GDL 82 does not communicate with the GTR 225. It will communicate with GTN 600/700 and GNS 400w/500w.
Q: Just purchased the GDL-82 and am wondering what type of connector is on the unit for the WAAS GPS antenna cable. I understand the GPS antenna has a TNC connector but dont see what type of connector is found on the UAT Box?
For the transponder antenna, there are female BNC (need male BNC ends) for the GPS side it is a female TNC (need male TNC ends).
Q: In the anonymous mode for VFR flight (i.e. 1200) does the GDL 82 mask the ICAO code from ATC as well as other aircraft?
PER THE GDL 82 manual: In anonymous mode, the GDL 82 transmits a temporary address instead of the aircraft's assigned ICAO address code, and a temporary Flight ID.
Q: I currently have a local shop installing a GDL 82 in my C182 and I assumed it would be compatible with my GTX 330 (no ES). I just saw the post saying it is not compatible with the GTX 330. Is that true?
The GTX 330 is a mode S transponder and the GDL 82 does not support mode S transponders. The GDL 82 only supports mode C only.
Q: When the GDL 82 is installed, will the transponder signal pass through the GDL 82 box to the antenna if the GDL 82 is turned off?
Per the Garmin GDL 82 manual there is a discrete line to annunciate GDL 82 failure. But it will not interfere with the transponder signal, and continue to transmit mode a/c.
Q: Does the Garmin GDL 82 require a blade type transponder antenna?
Garmin gives a list of tested/approved antennas. There are other that work just not tested by Garmin. The list is available in the installation manual. The Install Manual is available as a free download in the Documents tab of this webpage.
Q: I have a 1962 model Cherokee 160B which has a 12 volt elec system.
I noticed that the GDL82 requires either 14 or 28 volt. what would I have to do to use the GDL 82?
14v and 12v are interchangeable. It will work fine in your 12v application.
Q: Can this Garmin GDL 82 unit be installed in a Cessna C-162 Skycatcher with Garmin G-300s?
The make and model of the aircraft, as well as the G-300s, is irrelevant when determining if this will work in your aircraft. The determining factor is that your aircraft is equipped with a functioning mode C transponder. We recommend having a transponder test done to determine that your transponder will pass and work with the Garmin GDL 82.
Q: Will the Garmin GDL 82 be compatible with a KT79 transponder and an existing A-33 Antenna?
Because the KT79 is a mode C this will work. Per the installation manual the antenna must be A-33W version to support WAAS.
Q: Is the wiring harness that you build is complete and ready to go, does it have the proper pig tail installed so it can be plug into a computer or laptop a start the proses of entering info into the gdl 82 .
The harness comes with power, ground, usb port, and additional discrete lines.
Q: When you make a harness do you label whats what? power, ground, etc.
Yes. Each wire is labeled accordingly with a blue heatshrink label with text printed on it.
Q: Does the installation of the GDL 82 require an STC?
The GDL 82 is a TSO'd product, it does not have an STC and does not need one to be installed.
Q: I have a KT73 Transponder. Will the GDL 82 work with this?
The GDL 82 is made to work with mode C transponders. Because the KT-73 is a mode S, it will not work.
Q: If needed, can the harness for the Garmin GDL 82 be made longer than 10 ft?
Yes, please contact our avionics sales team for a quote and lead time on a custom harness for the GDL 82.
Q: Can I install the gdl82 in my RV9A for which I have the repairman certificate?
The gdl 82 is designed to be installed in an aircraft with a mode c transponder to provide ads-b out. So, if your RV has a mode C transponder, this will work great for your application.
Q: Is this Garmin GDL 82 compatible the the Garmin GTX 327 transponder?
Yes, since the GTX 327 is a mode C transponder, this is compatible.
Q: Should the Squat Switch for the GDL82 be installed on the airplane, or will the GDL 82 operate without this switch?
Per the manual(page 10-2): the GDL 82 can operate without the squat switch. This is an optional function.
Q: Does the ADSB OUT obligation also apply to the Garmin GTX328 transponder? If I have the GTX 328, can the GDL82 satisfy the mandate?
Yes, all aircraft are required to be ADS-B out compliant by 2020. The GDL 82 is not recommended for use with the GTX 328 since the GTX 328 is a mode S transponder. Even though the GTX 328 is a mode S transponder, it does not fulfill the ADSB requirement since it does not have extended squitter technology. You will need to upgrade your transponder, we recommend the Garmin GTX 335 which is a complete ADS-B Out compliant installation.
Q: Regarding the GDL 82 ADS-B box: Im using a Garmin 327 transponder and would like to know what the 10ft optional harness connects to, the transponder to the data link box or the data link box to the transponder antenna?
The 10 foot harness is terminated with the power/ground, rs-232 data line, and the usb programming port. Wires included but, not terminated to the connector, include the squat switch input, anonymous mode input, and ads-b failure annunciator interconnects. Connection to an existing transponder will require wiring the gdl-82 between your 327 output coax and your existing transponder antenna.
Q: Please tell me if GDL82 will work with GPS MAP 296 P / N 010-00356-00 transponder?
The Garmin GPSMAP 296 is not a transponder, it is a portable GPS. There is not connection between these two units.
Q: Can the RAMI AV-22 transponder antenna be used with the Garmin GDL82?
While the Rami AV-22 does broadcast on the 1030 - 1090mhz frequency, it has not been tested by Garmin on the GDL-82. Garmin recommends the CI-101 antenna, part # 11-17970 which has been tested with the unit.
Q: Can I install the GDL 82 in my experimental aircraft for which I do not have a repairman certificate? I am not an A & P.
Yes, you can perform the install, but you may still need a shop to sign off your ADS-B Out mandate compliance. Please check with your local FAA official to see what the process is to complete the mandate requirement sign off.
Q: Can you hook up the power and ground wires on the GDL 82 directly to the circuit breaker for the transponder? What should be the voltage, and current be?
Per the manual, the GDL 82 is wired to the transponder circuit breaker. The current must not reach 80% of the circuit breaker rated current. The GDL 82 works with both 14V and 28V systems.
Q: What are the requirements for the installer of the Garmin GDL 82? I was told that an A&P can install and sign this off?
The GDL 82 can be installed by an A&P, and does not require purchase or installation through an avionics shop. The A&P must be able to test the transponder to verify the installation.
Q: Can the GDL-82 serve as the GPS source for a 406 MHZ ELT such as the ACK-E04?
Yes, this is compatible, you would use the RS232 wires for communication.
Q: Will this unit work in Australia for an ADS-B out solution? I have a microair T2000 mode C transponder.
Yes, this will work with the Micro Mode C transponder.
Q: I just received my GDL82 and wiring harness. Good job by the way. Do I still need my altitude encoder or can it be removed or can it remain installed and not interfere with the GDL82 operation?
You'll still need an altitude encoder with your transponder. The only GDL 82 interfaces with the transponder antenna output and the transponder antenna, there is no wiring that would affect the encoder.
Q: Does the GDL 82 with the 10ft. wiring harness include the wiring for the anonymous mode?
Yes, we will include that wire.
Q: What exactly is included in the connector kit? Please be specific. What is it for? Do I have to fabricate a cable for the connector kit. If so, why is Garmin making me fabricate a cable for this device? Why dont they just include a pre-fabricated cable?
The connector kit will include the connector, backshell, pins and the USB receptacle. If you would like, we do offer the unit with a harness, P/N: 11-15986 for an additional cost. Just use the dropdown selection on this web page and choose the "with 10 ft harness" model.
Q: Is the KLN-89B and/or the KX-135 GPS Antenna compatible with the GDL-82 or do I have to install GA-35 GPS antenna?
Per the installation manual, you have to install the GA35 antenna.
Q: I have an old Bendix 661 transponder that has recently been overhauled and works perfectly. Will the GDL 82 work with it?
As long as your transponder is mode C and passes a transponder test, you can use it with the GDL 82.
Q: The GDL 82 installation manual in 4.5.1 says the unit must be mounted as close to the antenna as possible. How close is close enough?
Referring to the transponder antenna. Do not exceed 10 ft. The closer to the antenna you are the better.
Q: Is there any ADS-B out unit from Garmin that is compatible with a mode S (Garmin GTX 330) transponder?
Unfortunately there is not. You will need to either upgrade the GTX 330 to ES or get a new transponder. with ADS-B out capabilities.
Q: I have a Stratus 3 Ads-In and would like to purchase the GDL-82. Can we connect the Garmin 32 GPS antenna to the Stratus for better coverage area like a remote antenna would do?
No, this is not supported.
Q: What is the difference between your 11-15319 and 11-15986?
I am interested in the GDL82 with all of the wiring including the anonymous mode wiring and coaxs. dongle etc.
The difference between the two is that 11-15986 will include the wire harness. The wire for anonymous mode will be included. Coax will have to be a separate purchase. Please look at our custom coax cable assembly page.
Q: What failure annunciator lamp is recommended for the GDL-82? What toggle switch would be suitable for selecting anonymous mode on/ off?
Garmin recommends the press to test indicators found under part # 11-03910.
Q: Does the installation of the GDL 82 require an STC and 337?
The GDL 82 is a TSO'd product, it does not have an STC and does not need one to be installed but will require a 337.
Q: Will the Garmin GDL 82 work on the Maule 220c?
This product is FAA TSO Approved and can be installed in a certified aircraft. There is no STC approved models list. It requires that a functioning Mode C transponder is already installed in the aircraft. As long as your Maule has the working mode C xpdr, it will work in your application.
Q: Please confirm that the GDL 82 can provide a WASS source for both its own ADSB solution and a G5 using the single GPS antenna provided within this kit.
Yes. The GDL 82 can connect to the G5 via a RS-232 connection.
Q: Will the GDL 82 work with a Collins TDR-90 non Mode S transponder?
The GDL 82 is designed to work with Mode C transponders.
Q: Will the GDL 82 work in Canada?
No, this is for the USA ADS-B system only.
Q: Is the Garmin GDL 82 FAA TSOd?
Yes, this is FAA Approved for use in certified aircraft.
Q: I have a gtx330 transponder. If I upgrade that to the ES, will that make it compatible with the GLD82 for ADSB-out compliance? (I do NOT have a current WAAS source as I have a 430 NON WAAS.)
You do not need to upgrade to the ES to make the GDL 82 work. Since the GTX 330 is a Mode C transponder, it will work with the GDL 82, but you will need to install the included WAAS GPS antenna for full ADS-B out compliance.
Q: Can the Garmin GDL-82 be installed in such a way that it will always default to Anonymous mode if the transponder is set to 1200? Im asking because I dont want to have to install the optional switch to get the benefit.
Per Garmin, you will have to install the anonymous mode switch.
Q: Can the GDL-82 unit be physically mounted in any orientation?
Yes, it can be mounted in any orientation. Since there is no ADAHRS module inside, the orientation has no specific requirement.
Q: Would the King KT76C transponder work with the gdl-82 unit?
Yes, the GDL 82 works well with most MODE C transponders.
Q: Will the new Trig TA50 antenna work in place of the larger antenna?
The GA35 is the only recommended antenna to use with the GDL82 per Garmin.
Q: My aircraft used to have a 530w in it, but the previous owner removed it at sell but left the gps waas antenna. Can this unit just be hooked up to the already existing antenna that was used for the 530w?
If you currently have the GA35 WAAS/GPS antenna, it will work with the GDL82. However, a new antenna will come with the kit.
Q: How does the antenna attach? Is it a magnetic base?
The GA 35 antenna must be installed with hardware on top of the aircraft. Please refer to the installation manual for proper installation.
Q: What type of coax cable is required to install this unit?
Per the installation manual RG400 / RG142 will work for this.
Q: Is the GDL82 compatible with the GTX327 transponder to meet 91.227 requirements for ADS-B out?
Yes it is.
Q: If I couple this unit with my Garmin 330 transponder does it make me 2020 legal?
Yes, this, along with a Mode C transponder, will make you legal for the 2020 mandate.
Q: Does this GDL 82 unit use an internal GPS or external GPS?
This unit uses an external GPS, it is the Garmin GA 35 WAAS GPS antenna.
Q: The installation manual for the GDL 82 calls for a GA35 antenna but will a GA56 antenna work as well?
A GA 56 will not work as well. The GA 56 is a non WAAS GPS while the GDL 82 requires the GA 35, which is a WAAS GPS antenna. To be 2020 compliant, you must have a WAAS GPS source.
Q: I currently have a GNC 250XL and a GTX237 in my RV-8. Can I attach the GDL-82 to the same GPS antenna I use for my GNC 250XL? If so do I use a splitter? Also, can I ever turn off the GDL 82 if I dont want the FAA to see me?
The GPS signal cannot be split from the antenna. Also the GNC250XL is not a WAAS GPS unit so it will not work as a GPS source for the GDL 82. The GDL 82 also has an anonymous mode setting that is activated by a switch.
Q: For the Garmin GDL-82, you mentioned for aircraft operating below 18,000’ in the United States, can this device operational in international ? and can the Garmin GDL-82 enable to be set up for as a receiver, besides functioning as output broadcast ?
The GDL 82 is only for ADS-B OUT only and cannot be modified for another function. The US is the only country with functioning ADS-B towers, however other aircraft equipped with ADS-B receivers will be able to see you as traffic in their units.
Q: Is the Garmin GDL-82 approved by an FAA STC or TSO cert?
The GDL 82 is approved by FAA TSO.
Q: Does the installation kit include a circuit breaker? If not, what size does the Garmin gdl 82 require?
It will not include a circuit breaker. This uses a 5 AMP breaker. Please refer to the manual for further information.
Q: If the aircraft already has a GPS 430 WAAS antenna, is the antenna installation required? Can it be split in to the unit?
Yes, the GDL 82 will accept GPS data from an existing GNS 400W/500W series. It must be the WAAS 430 or 530. No second GPS antenna is needed.
Q: Where can I find the STC AML for installation of the GDL 82 on certified aircraft?
Garmin does not have an AML for this.
Q: Can the GDL-82 GPS position be used for a 406 ELT?
Yes , this is compatible you would use the RS232 wire for communication.
Q: I have a Garmin 430W, a KT79 transponder and an Avidyne 620 TAS system. Will the GDL82 work with these three components?
The GDL 82 will work with the KT79 transponder. The only unit this system needs to interface with is the mode C transponder.
Q: We have a Collins TDR-94, p/n 622-9352-005. Will the GDL-82 interface with this properly?
The GDL 82 is made to interface with Mode C Transponders only. If the Collins xpdr is mode C this should work fine.
Q: Will this installation be a major or minor alteration?
The unit has a TSO so it will require a 337 form and a field approval.
Q: Any special permit to install the GDL 82 in a Cessna 210 ADSB OUT?
No, this unit is FAA Approved and is legal to install as an ADS-B out unit in certified aircraft. Please confirm with your A&P installer that the unit will work for your specific aircraft. This has been commonly installed in Cessna 210 aircraft.
Q: I have a Garmin GTX 327 transponder, is this GDL 82 module compliant with Nav Canada regulations coming into effect in Canada for GA?
The GDL82 will not function in Canada as it does not produce the required 1090ES signal.
Q: I would be using this on my current plane, however will possibly transfer to my project in about a year. Will I be able to reprogram the same unit on the other aircraft? Thanks.
Yes, the information on the unit can be reprogrammed.
Q: Is this Garmin GDL 82 ok for 1090 or dual band?
No, this broadcasts on 978 mhz and is not compatible with 1090 or dual.
Q: When installed, what does the squat on the GDL 82 button do?
The squat switch or weight on wheels switch lets the transponder know that the aircraft is on the ground or in the air.
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GDL 82 broadcasts on the 978 MHz frequency, providing a rule-compliant ADS-B “Out” solution for aircraft operating below 18,000’ in the United States. Installation is quick and easy because GDL 82 utilizes a patent-pending design, in which GDL 82 is installed in-line with the aircraft’s existing transponder antenna wiring to transmit the necessary ADS-B “Out” information. The WAAS GPS receiver required for ADS-B compliance is built-in and a GPS antenna is included to offer additional cost-savings for aircraft owners without an existing WAAS GPS on board their aircraft.
82 also contains AutoSquawk interrogation technology, whichGDL interfaces with most Mode C general aviation transponders to synchronize the squawk code and pressure altitude information from the transponder with GDL 82, eliminating the need to install a separate dedicated UAT control panel and altitude encoder. (Please reference the installation manual to determine if the existing Mode C transponder meets compatibility requirements.) This technology not only simplifies installation but also eliminates the burden of the pilot manually keeping the squawk code in sync.
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