Garmin G3X Touch Pilot’s Guide190-01754-00 Rev. A67EISSystemOverviewFlightInstruments EISCNSInterfaceGPSNavigationFlightPlanningHazardAvoidanceAdditionalFeatures AFCS Annun/Alerts Appendix Index3.2 LEAN ASSIST MODE (OPTIONAL)NOTE: The pilot should follow the engine manufacturer’s recommendedleaning procedures as described in the Pilot’s Operating Handbook (POH).A Lean Button is displayed on the Fuel Tab of the Eng Page when Lean AssistMode is enabled and at least one Exhaust Gas Temperature (EGT) or Turbine InletTemperature (TIT) input is configured (refer to the G3X Touch Installation Manual formore information).Using Lean Assist Mode:From the Fuel Tab of the Eng Page, touch Lean. As the mixture is leaned, oneof the cylinders’ exhaust temperature will peak. Continuing to lean the mixturewill cause each additional cylinder to peak (if applicable) until the last of thecylinders peaks. To cancel Lean Assist Mode, touch Lean again.When the Lean is selected, the Lean Assist Mode waits for a cylinder’s EGT to reacha peak temperature and decrease by at least 7°F. The peak EGT for each cylinder isdisplayed as a small grey number above each bar on the graph. To prevent detectionof false peaks, the system waits for a cylinder’s EGT to increase by at least 15°F beforedetecting a peak. In addition, if the cylinder temperature rises above a previouslydetected peak by more than 100°F, the previous peak is considered false.A cylinder temperature bar graph is displayed if CHT/EGT data is configured on 4or more cylinders. A readout showing the temperature deviation from peak (DEGT) isdisplayed in place of the normal EGT temperature number. The temperature deviationof the first cylinder to peak is light blue. A light blue hollow triangle appears on theEGT gauge to represent the peak EGT for that cylinder.
