APX 340 Intermittent

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   Since we installed our APX 340 it work normally most trips. Altitude transmitted to center is accurate. Then out of the blue, new trip the altitude transmitted to center is off by 400 feet.  Some times below sea level. Altimeter and encoder check normal.  Avidyne Replaces APX 340.  Everything works fine,  Then same as above happens again.  Turn the APX 340 off, and back on altitude is correct. 
Ok....spend another $1,000 and replace the encoder.  That would be the logical thing to do..  Except that we have the same problem with the IFD 540.  Most of the time works find.  Then i'm on climb out and the screen goes blank, then on , then off, then on then off 4 times, then dumps all programing.  Re enter everything and  works fine for the next couple of trips.  Then a failure on an approach.  Take the unit back to Gulfcoast, after many upgrades, same thing again.  
I'm a real jerk, I spend $3,000 more and install an MLB 100.  Works find on the inital trip. Guess what, next trip the IFD 540 goes off , the the APX 340 shows me below sea level.    

I'm at my wits end.    Avidyne has turned our aircraft into an expermental toy. Fly at your own risk. Someone is going to get hurt, this is not safe.

Help  

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
aweltman Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 21 Feb 2016 Location: Boca Raton, FL Status: Offline Points: 2	Post Options Post Reply Quote aweltman Report Post Thanks(0) Quote Reply Topic: APX 340 Intermittent Posted: 21 Feb 2016 at 9:01pm
	Since we installed our APX 340 it work normally most trips. Altitude transmitted to center is accurate. Then out of the blue, new trip the altitude transmitted to center is off by 400 feet. Some times below sea level. Altimeter and encoder check normal. Avidyne Replaces APX 340. Everything works fine, Then same as above happens again. Turn the APX 340 off, and back on altitude is correct. Ok....spend another $1,000 and replace the encoder. That would be the logical thing to do.. Except that we have the same problem with the IFD 540. Most of the time works find. Then i'm on climb out and the screen goes blank, then on , then off, then on then off 4 times, then dumps all programing. Re enter everything and works fine for the next couple of trips. Then a failure on an approach. Take the unit back to Gulfcoast, after many upgrades, same thing again. I'm a real jerk, I spend $3,000 more and install an MLB 100. Works find on the inital trip. Guess what, next trip the IFD 540 goes off , the the APX 340 shows me below sea level. I'm at my wits end. Avidyne has turned our aircraft into an expermental toy. Fly at your own risk. Someone is going to get hurt, this is not safe. Help
	ajw

AviSimpson Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 31 Mar 2015 Location: Lincoln, MA Status: Offline Points: 765	Post Options Post Reply Quote AviSimpson Report Post Thanks(1) Quote Reply Posted: 22 Feb 2016 at 8:51am
	Pm Sent.
	Simpson Bennett Avidyne Corporation Product Manager