tblf

SB 1762 rev A (software version v5.4) does not change STC requirements for 3rd party autopilots, which requires dual ARINC inputs from GAD29B to 430W. Therefore you won't get weather or traffic on your 430W/530W, since you must disconnect the ARINC channel from GTX345 to GNS430W/530W. The SB is super confusing as it makes you believe that it reduces the need of dual ARINC inputs, since it says: "Added ARINC 429 input for G5. Dual ARINC 429 inputs to the GNS from the G5 are no longer necessary". If you follow the SB, it appears to work, but you can get unexpected behavior, such as lateral oscillation in GPSS mode tracking magenta line. Basically, there are non-obvious, and potentially dangerous side effects. Garmin will tell you not to follow their own SB, and that it does not overrule the STC. They likely thought it would work, did not sufficiently test it, and now wished they never would have written the SB as it is. The solution of using Foreflight (or Garmin Pilot) to display weather and traffic is a workaround, but not the real solution (at least for me), since iPad tend to overheat during summer time. I want the weather and traffic also on the GNS display. Garmin really needs to fix this, since they screwed this up, and the only fix is another software update to the GNS430W, which they haven ot committed to.