May 7, 20233 yr Hey all, These are in the Black Square Bonanza: https://imgur.com/a/VBw1rJE At the top left of the dash. It looks as though the left button is the same as the CDI button on the GPS - so presume its a remnant from before a more advanced GPS with built in CDI button existed? Is this wrong? How about the GPS/APR button on the right with 'ATM' and ACTV'? This doesn't seem coupled to the autopilot, but I could be wrong. I've skimmed the manual for the aircraft and could find a reference to almost everything except these!
May 7, 20233 yr Normally you have CDI button on GNS (gps) unit that switched between GPS and LOC mode . Like you said, this panel is convenient “wiring” to bring autopilot approach arm in front of the pilot . When you fly solo IFR it’s nice to have a shortcut Life time flight sim enthusiast, current airplane owner 172P (past C182F). FAA CP/IR ASEL/AMEL, FI ASELMy System: AMD Ryzen 9 9950X3D , MSI X870 GAMING PLUS, 64G RAM, ASUS RTX5090, 4T SSDPut my hands on (pic/dual/given)7GCAA, 8KCAB, BE24, BE76, BE35-C33, BE35, C150, C152, C172B/N/P/R/SP, 182F, M20E,M20C, M20J, AT6(SNJ4), PA28-140,PA28-151, PA28-161,PA28-181,PA28RT-201,PA28R-180/201T, PA24-250, PA32-300R, PA44, AC114, YAK-18T, YAK-52, SR22
May 7, 20233 yr Not sure the buttons are wired up, but the readouts are handy as visual confirmation. Bert
May 7, 20233 yr 2 hours ago, Bigbluss said: so presume its a remnant from before a more advanced GPS with built in CDI button existed That is likely the case. As a matter of fact.. is there not another GPS option in the panel? Bert
May 11, 20233 yr In older IFR GPS units, the CDI source select was often not built into the GPS and required a separate physical switch in the cockpit. Usually it was over by the HSI or nav head, vs on the radio stack. This was one style of selector that was used. Andrew Crowley
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