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Aviation Alerts and Advisories

G1000 NXi Upgrade for G1000-equipped King Air C90 Series


All G1000-equipped Textron Aviation King Air C90 series aircraft equipped with G1000 System Software Versions 0636.01, 0636.02, 0636.03, 0636.05, 0636.06, or 0636.07 are affected.




Optional: This Service Bulletin may be incorporated at the owner’s discretion and is not warranty reimbursable.


This STC Service Bulletin contains instructions to upgrade G1000 (legacy) systems to a G1000 NXi system in Textron Aviation King Air C90A, C90GT, and C90GTi. This upgrade requires both hardware and software updates.

Required hardware:

  • GDU 1050A/1550 NXi display hardware
  • GCU 475 NXi keypad controller with analog joystick

Optional hardware:

  • Flight Stream 510 Connext wireless connectivity and Database Concierge
  • GMA 1360D Audio Panels
  • GWX 75 Weather Radar
  • GTX 335R transponder with ADSB-Out
  • GTX 345R transponder with ADSB-In/Out

G1000 NXi System Software Version 3557.00 includes:

  • Nexrad animation
  • Visual approach support
  • Flight plan auto-nomination
  • Transition to approach
  • SurfaceWatch*
  • Vertical situation display
  • HSI map
  • Visual reporting points
  • IFR/VFR maps
    GWX 75 radar ground clutter suppression and turbulence detection (optional)*
  • Dual charts to allow pilot selection of FliteCharts or ChartView for display*
  • Cockpit Connectivity, including wireless database updates
  • ADS-B In/Out (GTX 3X5R)
  • Bluetooth Audio (GMA 1360D)

*Prior purchase of an enablement card and database subscriptions are required.

ASDN Service Bulletin 1979 Rev A