What to do if Garmin cooling fan failed?
If the cooling fan has failed, check the wires between P1001-43, -58, and -59 and the fan to ensure they are not cut, damaged, or broken. Ensure the fan connector is completely engaged and that the fan blades are not obstructed and can rotate freely. Note that the fan does not turn on if the unit is cool.
What to do if my Garmin GPS signal levels are very low?
If your Garmin GPS signal levels are very low, consider the following: * Check the GPS antenna installation, connections, and cable routing. The GPS antenna must be mounted on top of the rotorcraft. * Ensure the rotorcraft is clear of obstructions like hangars, buildings, and trees. * Address potential RF interference at 1575.42 MHz from VHF COM by adding a 1575.42 MHz notch filter in the COM coaxial, fixing or replacing the COM, disconnecting the ELT antenna coaxial to check for possible re-radiation, or moving the GPS antenna further from the COM antenna.
Why Garmin GPS does not compute a position?
If your Garmin GPS unit is not computing a position, it might not be receiving adequate GPS signals. Check the GPS antenna connections and ensure the rotorcraft is clear of hangars, buildings, trees, etc. Alternatively, wait 20 minutes for the GTN to download the full GPS almanac and acquire its position.
What to do if Garmin GPS signal drops when avionics are on?
If GPS signal levels drop when avionics are turned on, it is likely due to noise interference from other avionics. To resolve this, turn off all avionics, then turn them on one at a time to isolate the source of the interference. Also, route the GPS cable and locate the GPS antenna away from potential sources of interference.
What to do if Garmin datalink is inoperative?
If the Garmin GTN cannot communicate with the GDL 69, check for proper configuration. Also, ensure the GDL 69 is powered up and that the GDL 69 Ethernet ports are enabled. HSDB data from the GDL 69 can be routed to the GTN through other Garmin LRUs, so ensure that all Garmin LRUs are powered up.
What to do if Garmin audio panel is inoperative?
If the audio panel is inoperative or the connection to the Garmin GTN is lost, ensure the audio panel is receiving power and connected to ground. Also, verify the wiring from the audio panel to the GTN. It is possible that the audio panel has failed.
What to do if my RS-232 device is not communicating with the Garmin GTN?
If an RS-232 device is not communicating with your Garmin GTN, there are several potential causes. First, check the RS-232 port setting for the port that the device is connected to. Second, verify the configuration of the other device. Third, ensure the GTN RX is connected to the remote device TX and GTN TX is connected to the remote device RX. Also, verify that there is only one TX source per RX port. Check the wiring. Finally, ensure the correct baud rate and parity settings are selected in Config Mode.
What to do if Garmin key is stuck?
If the bezel’s Home key is stuck in the enabled or pressed state, press the Home key again to cycle its operation. If the message persists, contact Garmin Product Support.
Why is my Garmin side tone level too low or too high?
If the side tone level on your Garmin device is too low or too high, it could be due to the wrong type of headsets or the side tone level needing adjustment. If necessary, adjust the side tone level on the COM Setup Config Mode page.
Why is my Garmin GTN booting into Configuration mode?
If your Garmin GTN is booting into Configuration mode instead of Normal mode, it's likely because the Software Loader Card is inserted in the SD card slot. Remove the Software Loader Card and insert the database card. If this doesn't solve the issue, reload the software into the GTN and ensure it powers up in normal mode afterward.
Refers to pilot guides and maintenance manual for operation and testing.
Outlines maintenance intervals and checks for GTN and GMA 35.
Refers to maintenance manual for troubleshooting GTN/GMA 35 errors.
Refers to maintenance manual for equipment removal and replacement.
Outlines antenna inspection after lightning strike.
System does not require overhaul; self-test monitors health.
Diagram shows LRU locations and wire routing for GTN 6XX/7XX and GMA 35.
General| Touchscreen | Yes |
|---|---|
| COM Transceiver | Yes |
| NAV Receiver | Yes |
| Operating Temperature | +55°C |
| Storage Temperature | +70°C |
| Certification | TSO-C113a |
| Interfaces | RS-232, ARINC 429 |
| Navigation Capabilities | VOR, ILS |
| Database Support | Jeppesen |
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