Garmin GNC 420AW Pilot's Manual

Also see for GDL 69: Pilot's guide addendum Pilot's guide addendum Activation Instructions Activation Instructions Pilot's guide addendum

Contents

Garmin GNC 420AW Pilot's Manual Manual pdf 45 page image

39Part Three: Section 3TAWS AlertsWARNING— Estimated potential impact in approximately15 seconds after a FLTA warning pop-up alert. FLTA warningpop-up alerts are accompanied by the aural message “Terrain,Terrain; Pull Up, Pull Up” or “Terrain Ahead, Pull Up; TerrainAhead, Pull Up”. Similarly, a “Obstacle, Obstacle; Pull Up, PullUp” or “Obstacle Ahead, Pull Up; Obstacle Ahead, Pull Up”alert is also provided. The time to an alert can vary with condi-tions, therefore there is no guarantee of a 15 second warningalert being issued.Phase of Flight Level Flight DescendingEn Route 700 ft. 500 ft.Terminal 350 ft. 300 ft.Approach 150 ft. 100 ft.Departure 100 ft. 100 ft.Minimum TERRAIN Clearance Values for FLTA AlertsNOTE: During the final approach phase of flight, FLTAalerts are automatically inhibited when the aircraft isbelow 200 feet AGL while within 0.5 NM of the approachrunway or is below 125 feet AGL while within 1.0 NM ofthe runway.Premature Descent Alerting (PDA)The TAWS system issues a Premature DescentAlert (PDA) when the system detects that the aircraftis significantly below the normal approach path to arunway. PDA begins when the aircraft is within 15 NMof the destination airport.PDA ends when the aircraft is either:• 0.5 NM from the runway thresholdOR• is below an altitude of 125 feet AGL while within1.0 NM of the threshold.(EIGHT!BOVE4ERRAIN&EET$ISTANCE&ROM$ESTINATION!IRPORTNM 0$!!LERTING!REA0$!!LERTING!REA2UNWAY4HRESHOLDCAUTION — The above annunciation and pop-upterrain alert are displayed during a PDA alert. ForTAWS, the PDA alert is accompanied by the auralmessage “Too Low, Terrain”.190-00356-30 Rev H