The flight crew can manually inhibit FLTA visual annunciations and voice alerts. Discretion
should be used when inhibiting alerts and the system should be enabled when appropriate.
When PDA and FLTA alerts are inhibited, the system status annunciation ‘TER/OBST INHIB’
appears in the system alert window. 257: TAWS Inhibit Annunciation
While Terrain alerting is manually inhibited (or the TAWS system is not available or has failed), the system may display a ‘LOW ALT’ annunciation on the PFD next to the altitude tape if the following conditions are met:
The aircraft is on an SBAS approach.
The Final Approach Fix is the active waypoint.
The aircraft is at least 164 feet below the prescribed altitude at the Final Approach Fix.
See the
Low Altitude Annunciation portion of the Flight Instruments section for more details about the ‘LOW ALT’ annunciation.
