No, it’s not the 1000 feet to go beeps. It’s a much higher tone and quicker. I don’t think it’s the 220 ft altitude deviation beep. And it only happens once in a while.
Do you have an ACK E-04 by chance?
Yes, that was my first thought so I sent it in to the manufacturer and they tested it and say it's fine. Plus the beeps are not two seconds apart. They are like 1/2 or 1 second apart. Three sets of three quick high pitched beeps. So I'm stumped. There are no warning annunciates and not fault codes I can find in the GSX setup mode.
If there's something making an unknown beep in an E-04 equipped RV, my money is on the ACK until proven otherwise!
I mean, at this point I'd actually be relieved to find something else was responsible. Keeping my fingers crossed.
Dumb question but: could it be a CO monitor?
Is it always occurring at a particular altitude?
I do t think it’s always the same altitude, but maybe. I thinks it’s always been relatively high - like 9,000. I’ll note the altitude next time. It is a 650nxi.
That’s not a dumb question. I have a panel hard wired CO2 detector. I’ll push its test button and see of it’s the same sound. It happens only one on a while.
It’s not the same beep as the ELT test. It hasn’t happened in a long while but today, in Colorado while climbing hard to 13,000 from Longmont it happened again. And then again at startup at Leadville airport.
That is what I was just going to say, sounds like the O2D2 or at least mine does that when it is on.
I too get the three beeps In my Bonanza. We have an all new Garmin panel: G3X, GI 275, GFC 500, GMA 345, GTN 750xi, GNS 430W, and GTX 345. It happens about once per flight. It’s kind of loud and consequently a bit alarming. It’s not the ELT, CO detector, or altitude alert. It almost seems like it’s being generated by the audio panel. But I don’t know. It surprises me every time.
Is it happening near a big airport? Any marker beacons still out there?
It’s not a marker beacon sound. The three beeps happen in quick succession. When it happens seems kind of random. But, I would say it’s usually earlier in the flight rather than later. I just combed through the GMA 345 Pilot’s guide but I didn’t find anything.
I don't know. I see no annunciation and the autopilot runs the elevator trim with no apparent problems. I also have gone into the data logging card and I see nothing unusual there. Also nothing in the G3X setup mode in the alerts log. It does not happen every flight.
Hard to say because I’m almost always climbing to a higher altitude in the Bonanza. I’ll start paying more attention to when it actually occurs. I’m pretty sure it only does it once per flight.
