Garmin Service Advisory NO.: 1478 Rev A


G5000-equipped Cessna Citation Sovereign 680 and Citation X 750 aircraft, and G3000-equipped Cessna Citation M2 and Cessna Citation CJ3 aircraft with navigation database cycle 1413 or earlier are affected.


Aircraft with navigation database cycle 1413 Rev 2 and later are not affected by this bulletin.

The navigation database cycle can be viewed on the GTC (see Figure 1). From the Home Screen, touch Utilities > Setup > Avionics Status > Database. Navigation Database cycle 1413 Rev 2

Figure 1 – Database


RNP (Required Navigation Performance) data included in the LP and LPV approaches that are attached to the end of this service alert cause the scale factor of the CDI (Course Deviation Indicator) to be incorrect. The incorrect scale factor affects the displayed course error on the CDI.


Until navigation database cycle 1501 (or later) is loaded, do not fly LP or LPV approaches that annunciate “RNP” near the center of the HSI (see Figure 2) when the active waypoint is the final approach fix (FAF) or the aircraft is on final approach inside the FAF. A list of these approaches is attached to the end of this service alert.

Figure 2 – HSI

This issue will be resolved in navigation database cycle 1501 (and later).


35 years component-level Aviation/Electronics repair/Avionics retrofit experience. FCC General Radiotelephone with Ship Radar. Navcom-Audio, Transponder-Pulse-Radar, Autopilot expertise. IT Administration since 1983. Private Pilot since 1986. CAD designer since 1990. FAA Certified Repair Station Chief Inspector since 1994. Started 3 Avionics Shops. College: Business Administration/Marketing. Motorcycle enthusiast. 6 year USAF Veteran, Ground Radio Equipment Technician (30474, E-5). WordPress novice.

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