Potentially this issue has arisen due to refinements of internal reference data used by the avionics.
I duplicated your route in the Flight Planner, chose a (C172) G1000 glass cockpit, and for me, the resulting flight worked perfectly, including a successful ILS descent and touchdown at KLEX.
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I am in the habit of most always selecting my chosen ‘approach’ option and manually approving the respective ‘Transition’ choice, confirmed prior to departure.
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In this instance, on the navigation G1000 (and using the mouse) the process followed was:-
- Press ‘Proc’ or Procedure Mode
- Scroll the focus to ‘Select Approach’ and press [enter]
- Scroll the focus to ‘RNAV22 LPV’ option and press [enter]
- A dropdown appears in respect of the ‘Transition’ selection (presumably because an RNAV22 approach at KLEX can arrive from one of three outermost directions; each conveniently portrayed in the adjacent Map window to aid and improve user differentiation) :-
… (i) SIRBE
… (ii) UPRAW
…(iii) VICGO I chose this option by scrolling the focus to and press [enter] - Scroll the focus to ‘LOAD’ button and press [enter] for a contiguous flight plan from KLUK to KLEX
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My ‘work’ for the duration of this flight was then to timely engage (i.e. Grab) the glide slope, deploy the flaps and control the throttle through finally powering down the C172 at the destination parking spot.
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Wow, I did not realize that area of the USA was as flat as a pancake for as far as the eye can see…
For anyone who may be interested, below is a link to a short tutorial YouTube video (work of Huddison to which I have no association) demonstrating how to carry out an RNAV Approach for a G1000 AP (noting similar principles likely apply to other contemporary AP’s) :
Autopilot Landing (
) & RNAV Approach using the G1000 NXI Mod
