Garmin GTN 750 STC GTN 6XX/7XX AFMS - Page 23

GARMIN Ltd. or its Subsidiaries, c/o Garmin International 1200 E. 151st Street Olathe, KS 66062 USA AIRPLANE FLIGHT MANUAL SUPPLEMENT or SUPPLEMENTAL AIRPLANE FLIGHT MANUAL for STC SA02019SE-D GARMIN GTN NAVIGATION SYSTEM 3.2.2 GPS APPROACH DOWNGRADE During a GPS LPV, LNAV/VNAV, or LNAV+V approach, if GPS accuracy requirements cannot be met by the GPS receiver, the GTN will downgrade the approach. The downgrade will remove vertical deviation indication from the VDI and change the approach annunciation accordingly from LPV, L/VNAV, or LNAV+V to LNAV. The approach may be continued using the LNAV only minimums. During a GPS approach in which GPS accuracy requirements cannot be met by the GPS receiver for any GPS approach type, the GTN will flag all CDI guidance and display a system message "ABORT APPROACH-GPS approach no longer available". Immediately upon viewing the message, the unit will revert to Terminal navigation mode alarm limits. If the position integrity is within these limits lateral guidance will be restored and the GPS may be used to execute the missed approach, otherwise alternate means of navigation must be utilized. 3.2.3 LOSS OF COM RADIO TUNING FUNCTIONS If alternate COM is available: Communications USE ALTERNATE COM If no alternate COM is available: COM RMT XFR key (if installed)...... PRESS AND HOLD FOR 2 SECONDS NOTE This procedure will tune the active COM radio the emergency frequency 121.5, regardless of what frequency is displayed on the GTN. Certain failures of the tuning system will automatically tune 121.5 without pilot action. 3.2.4 LOSS OF AUDIO PANEL FUNCTIONS (GMA 35 Only) Audio Panel Circuit Breaker PULL NOTE This procedure will force the audio panel to provide the pilot only with communications on the Non-GTN 750 radio. If only a GTN 750 is installed in the aircraft, then the pilot will have communications on the GTN 750. The crew and passenger intercom will not function. 3.2.5 TAWS CAUTION (Terrain or Obstacle Ahead, Sink Rate, Don't Sink) 190-01007-A2 Rev. 1 FAA APPROVED DATE: _M__A_R_C_H__1_8__,_2_0_1_1__ Page 23 of 31