Page 2 - KEYS AND KNOBS; Large left knob; Figure 1-1 Keys and Knobs; Left-hANd Keys ANd KNobs; left
GNC 420/420A Quick Reference KEYS AND KNOBS 2 190-00140-21 Rev. F Large left knob Large right knob Small left knob Small right knob NRSTOBS MSG (message)FPL (flight plan)PROC (procedures) COM Power/ VolumeCOM Flip-flopCLR (clear) ENT (enter) MENU RNG (map range) Direct-to 1 2 3 4 5 6 7 8 9 10 11 12 ...
Page 3 - RiGht-hANd Keys ANd KNobs; Powering on the GNC 420:; Knob clockwise
GNC 420/420A Quick Reference 190-00140-21 Rev. F KEYS AND KNOBS 3 RiGht-hANd Keys ANd KNobs The RNG Key allows the pilot to select the desired map range. Press the up arrow to zoom out to a larger area, or the down arrow to zoom in to a smaller area. The Direct-to Key provides access to the direct-t...
Page 4 - POWER ON; Key to; ENT; Key to display the; right; CURsoRs
GNC 420/420A Quick Reference POWER ON 4 190-00140-21 Rev. F 3) Once the self-test concludes, the Database Versions Page appears which shows the current database information on the NavData® Card and Terrain Data cards. Press the ENT Key to acknowledge the Database Page and proceed to the Instrument P...
Page 5 - FREQUENCY SELECTION; Selecting a frequency:; dAtA eNtRy; Data is entered in the GPS Window using the large and
GNC 420/420A Quick Reference 190-00140-21 Rev. F FREQUENCY SELECTION 5 Selecting a frequency: 1) Turn the large left knob to select the desired megahertz (MHz) value. For example, the ‘135’ portion of the frequency ‘135.325’. 2) Turn the small left knob to select the desired kilohertz (kHz) value. F...
Page 6 - MAIN PAGE GROUPS; mAiN PAGe GRoUPs; page groups; Page Groups; NAV Pages 10 WPT Pages 4 AUX Pages 8 NRST Pages; NAV PAGe GRoUP
GNC 420/420A Quick Reference MAIN PAGE GROUPS 6 190-00140-21 Rev. F mAiN PAGe GRoUPs The GNC 420’s main pages are divided into four separate page groups: NAV, WPT, AUX, and NRST. Each page group is comprised of multiple pages. The page groups are selected using the large right knob. The individual p...
Page 7 - AUX PAGe GRoUP; The AUX Page Group includes four pages.; FPL; Key and using the small; knob to select the desired page.; NRst PAGe GRoUP; The NRST Page Group includes eight pages.; NRST; Key or by using the large; ) Use the small and large; knobs to; Key to confirm the selected; Key again to
GNC 420/420A Quick Reference 190-00140-21 Rev. F DIRECT-TO NAVIGATION 7 AUX PAGe GRoUP The AUX Page Group includes four pages. Flight Planning Utility Setup 1 Setup 2 NOTE: The flight plan pages are selected by pressing the FPL Key and using the small right knob to select the desired page. NRst PAGe...
Page 10 - The GNC 420’s auto-tune feature allows the pilot to
GNC 420/420A Quick Reference VIEWING AIRPORT INFORMATION 10 190-00140-21 Rev. F Viewing airport information by facility name or city: 1) Select the Airport Location Page (see page 6).2) Press the small right knob to activate the cursor. 3) Turn the large right knob to highlight the facility name (se...
Page 11 - DEFAULT NAV PAGE; defAULt NAV PAGe; The following symbols are used on the Default NAV; Quickly displaying the Default NAV Page:
GNC 420/420A Quick Reference 190-00140-21 Rev. F DEFAULT NAV PAGE 11 defAULt NAV PAGe Course Deviation Indicator (CDI) User-selectable Data Fields Active Leg of Flight Plan TO/FROM Flag The following symbols are used on the Default NAV Page (directly below the CDI), to depict the ‘active leg’ of a f...
Page 12 - MAP PAGE; mAP PAGe; The following symbols are used to depict the various
GNC 420/420A Quick Reference MAP PAGE 12 190-00140-21 Rev. F 4) Turn the small right knob to display the list of available data items. Continue turning the small right knob to select the desired data item from the list. 5) Press the ENT Key to select the desired data item and return to the Default N...
Page 13 - FULL SCREEN MAP
GNC 420/420A Quick Reference 190-00140-21 Rev. F FULL SCREEN MAP 13 Selecting a different data item for any data field: 1) With Map Page displayed, press the MENU Key to display an options menu. 2) Turn the large right knob to highlight ‘Change Fields?’ and press the ENT Key. 3) Turn the large right...
Page 14 - NAVCOM PAGE; NAVCom PAGe; The NAVCOM Page provides a list of the airport; bottom Row ANNUNCiAtoRs ANd messAGes; See Pilot’s Guide for detailed information.
GNC 420/420A Quick Reference NAVCOM PAGE 14 190-00140-21 Rev. F Inhibiting TERRAIN: 1) Select the TERRAIN Page and press the MENU Key. ‘Inhibit Terrain?’ is selected by default. 2) Press the ENT Key. The ‘TER INHB’ annunciation is displayed in the TERRAIN annunciator field when TERRAIN is inhibited....
Page 15 - NEAREST AIRPORTS
GNC 420/420A Quick Reference 190-00140-21 Rev. F NEAREST AIRPORTS 15 Scrolling through the list of frequencies: 1) Activate the cursor, if not already active, by pressing the small right knob. 2) Turn the large right knob to move the cursor through the list of frequencies. If there are more frequenc...
Page 16 - NEARBY AIRPORTS
GNC 420/420A Quick Reference NEARBY AIRPORTS 16 190-00140-21 Rev. F Viewing additional information for a nearby airport: 1) Highlight the identifier of the desired airport by scrolling through the list, as described in the preceding procedure. 2) Press the ENT Key to display the Airport Location Pag...
Page 17 - FLIGHT PLANS
GNC 420/420A Quick Reference 190-00140-21 Rev. F FLIGHT PLANS 17 Creating a new flight plan: 1) Press the FPL Key and turn the small right knob to display the Flight Plan Catalog Page. 2) Press the MENU Key to display the Flight Plan Catalog Page Menu. 3) Turn the large right knob to highlight ‘Crea...
Page 18 - SELECT AN APPROACH
GNC 420/420A Quick Reference SELECT AN APPROACH 18 190-00140-21 Rev. F Editing a flight plan: 1) Press the FPL Key and turn the small right knob to display the Flight Plan Catalog Page. 2) Press the small right knob to activate the cursor. 3) Turn the large right knob to highlight the desired flight...
Page 19 - ACTIVATE AN APPROACH; Not all approaches in the database are approved for GPS
GNC 420/420A Quick Reference 190-00140-21 Rev. F ACTIVATE AN APPROACH 19 5) Turn the large right knob to highlight ‘Load?’ or ‘Activate?’ and press the ENT Key. (‘Load?’ adds the procedure to the flight plan without immediately using it for navigation guidance. This allows the pilot to continue navi...
Page 20 - FLYING AN APPROACH; ) With an approach loaded in the active flight; PROC; knob to highlight ‘Activate; GUideLiNes foR fLyiNG AN APPRoACh
GNC 420/420A Quick Reference FLYING AN APPROACH 20 190-00140-21 Rev. F Activating the approach with vectors to final: 1) With an approach loaded in the active flight plan, press the PROC Key to display the Procedures Page. 2) Turn the large right knob to highlight ‘Activate Vector-To-Final?’ and pre...
Page 21 - FLYING THE MISSED APPROACH; OBS; Flying a Missed Approach:; Key. The next waypoint in; Key to ‘Select Approach?’ or ‘Activate
GNC 420/420A Quick Reference 190-00140-21 Rev. F FLYING THE MISSED APPROACH 21 • A ‘START PROC TRN’ prompt will appear in the lower right corner of the display to advise the pilot when the aircraft is at a safe distance to initiate a procedure turn. The procedure turn is displayed on the Map Page, b...