GNS 400W Series Installation Manual Page 5-1190-00356-08 Rev. G5 POST INSTALLATION CONFIGURATION AND CHECKOUTPROCEDURES5.1 Installation Check5.1.1 Mounting and Wiring CheckVerify that all cables are properly secured and shields are connected as the install drawings indicate.Installation may require that you check the movement of the aircraft controls to verify that there is nointerference.5.1.2 Connector Engagement CheckPrior to the configuration and checkout of the 400W Series unit the connector engagement should bechecked as described below:1. Turn on the 400W Series unit, and turn on the avionics master switch (if applicable).2. Place the 400W Series unit in the rack and engage the pawl mechanism.3. Turn the Allen screw of the locking pawl slowly clockwise until the 400W Series unit just comeson. A ―T‖ handle makes the turns easy to count, but do not over-tighten.4. Count the number of complete revolutions you can turn the Allen screw until it can not turn anymore (but take care not to over-tighten). Three turns is the minimum for proper installation. Iffewer than three turns are possible, the mounting rack should be moved aft (toward the pilot)such that the aircraft panel does not obstruct the unit from engaging in the rack.5.2 Unit Options5.2.1 Unit IdentificationOn the 400W series units, the (H) is displayed behind the model number when HTAWS is enabled, butnot selected as the Terrain Type. HTAWS is displayed when the HTAWS is enabled and is selected.5.2.2 HTAWS Enable InstructionsNOTEThe enablement card is serialized to the unit, therefore cannot be used on any other unit.Perform the following steps to enable HTAWS:1. With power off to unit, insert enablement card into left card slot. Turn on the 400W Series unit,and turn on the avionics master switch (if applicable).2. Screen will contain the unit serial number and a question, ―Upgrade HTAWS?‖3. Press CLR for NO and ENT for YES.4. Power off the system to reboot.5. After power up, verify that the serial number of the card matches the serial number of the unit.Also verify HTAWS or (H) is appended to the product name on start up screen.
