Page 1-32 G900X/G950 Installation and Maintenance Manual – G900X Installation Overview
Revision D 190-00719-00
1.8 Standby Instruments
Garmin recommends that all aircraft include the following list of standby instruments.
NOTE
These instruments are required for all G950 installations.
1.8.1 Pneumatic Airspeed Indicator
The standby airspeed indicator must have relevant FAA TSO-C2d or equivalent agency authorization.
The airspeed indicator is to be installed in a suitable location as specified in FAA FAR Part 23 regulations
or suitable equivalent authorizing agency regulations.
1.8.2 Pneumatic Altitude Indicator
The standby altitude indicator must have relevant FAA TSO-C10b or equivalent agency authorization.
The altitude indicator is to be installed in a suitable location as specified in FAA FAR Part 23 regulations
or suitable equivalent authorizing agency regulations.
1.8.3 Electronic/Vacuum Attitude Indicator
The standby attitude indicator must have relevant FAA TSO-C4c or equivalent agency authorization. The
indicator is to installed in a suitable location as specified in FAA FAR Part 23 regulations or suitable
equivalent authorizing agency regulations.
It is required that an electronic (including electromechanical) attitude indicator must meet the aircraft
level requirement to support Level A Display. Garmin recommends the following levels to support
HIRF/IEL requirements. These levels are based on unshielded wires.
• Metal Aircraft: HIRF – Category WD, IEL – Level A3 pin injection and cable bundle levels
at the pin injection levels.
• Composite Aircraft: HIRF – Category WF, IEL – Level B3 pin injection and cable bundle
levels at the pin injection levels.
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