
Instructions for Continued Airworthiness G600, GNS 530W, GNS 430W, 190-01080-05 Rev. 2
GMA 347, GTX 330D, GMX 200, WSI AV-200 Cessna 208/208B Page 20 of 29
Configure the GMA 347 in accordance with Section 4 of the applicable Modification Summary.
2.7.8.3 Return to service
Perform a Transceiver Operational Check as described in Section 5 of the applicable Modification
Summary.
2.7.9 GMX 200
2.7.9.1 Removal
Insert a 3/32-inch hex drive tool into the access hole on the unit face. Unscrew the screw shaft. The unit
will be loosened and then may be pulled from the tube. No special extraction tools are required.
2.7.9.2 Installation
Slide the unit into the tube and hand-tighten the threaded screw shaft using a 3/32" hex. The unit will be
pulled into the tube by the shaft, and the connectors will fully engage. The back of the bezel must be flush
to the mounting tube.
Original GMX 200 is reinstalled
Verify that the unit power-up self-test sequence is successfully completed and no failure messages are
annunciated. No configuration is required.
Replacement or repaired GMX 200 is installed
Verify software version and perform post installation checkout procedures in accordance with the
applicable Modification Summary. No configuration is required.
GMX 200 Configuration Module is Replaced
If the GMX 200 Configuration Module is replaced, then the configuration setup will need to be performed.
Refer to Section 4 of the appropriate Modification Summary for GMX 200 configuration instructions.
2.7.10 WSI AV-200 and WSI Antenna
2.7.10.1 Removal
To remove the WSI AV-200 or WSI antenna gain access to the unit (see Avionics Installation, GNS
530(W), GMX200, WSI AV-200, 150 P/N 005-00368-12/-13). For the WSI AV-200 loosen mounting screw
and disconnect wiring, then remove unit from mounting tray. For the WSI antenna remove the sealant
surrounding the antenna and the 4 screws that hold the antenna in place, then disconnect the coaxial
cable.
2.7.10.2 Installation
Installation of the WSI AV-200 is the reverse of removal.
To reinstall the WSI antenna:
1. Clean the antenna, doubler, and aircraft skin of any existing sealant or other material.
2. Secure the antenna using the 4 8-32 screws and torque to 12-15 inch pounds.
3. Using sealing compound (PS700), run a bead of sealant along the antenna where it meets the
aircraft skin. Ensure the antenna connectors do not become contaminated with sealant.
4. Reconnect the coaxial cable to the antenna connector and ensure it is secure.
2.7.11 GTX 330D
2.7.11.1 Removal
1. Insert the hex drive tool into the access hole on the unit face and rotate counterclockwise until the
unit is forced out about 3/8 inch.
2. Pull the unit straight out of the rack.
2.7.11.2 Installation
1. Insert a 3/32” hex wrench into the access hole on the front panel.
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