2.11.9 AVIONICS LIMITATIONS
• Use of GPS navigation capabilities
The system is to be used for situational awareness under VFR only.
• ADAHRS and AHRS Normal Operating Mode
The Attitude and Heading Reference System integrity monitoring function
requires external GPS and Air Data to be provided to the AHRS. An ADAHRS
receives Air Data internally and therefore only requires external GPS.
• Documents on Board
Following GARMIN documents must be immediately available to the flight crew
during flights:
• GTN 6XX Cockpit Reference Guide P/N 190-01004-04 Rev M (or
later)
• Backup Flight Instrument
The battery of the electronic standby instrument must be verified to be
operational before flight, or the electronic standby must be considered
inoperative. For the verification procedure, refer to section 7.7.5.2.
When operated in Day VFR, an operative standby instrument is not mandatory.
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