September 5, 20196 yr The Cessna 600 series standard a/p on Alabeo's C421 sometimes freezes in pitch mode - getting NONE on trying to climb or descend. When this happens, I have to switch the avionics master off and on to get the a/p to leave its whatever level. This of course loses GTN750 inputs as ell which have to be renewed. Anyone experienced this - anyone with a cfg or whatever fix ??
September 5, 20196 yr Have you turned off ALT mode before activating the Pitch wheel? If yes.. What happens if you switch the autopilot off and back on? Or switching FD off and on.. Edit.. just checked the AP code and NONE means that the Pitch reference is outside the +-30 degree limit.. Edited September 5, 20196 yr by Bert Pieke Bert
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