General G1000 reliability issues

[wingslevel]

Bought my Acclaim 2 years ago. 2009, already had .37 software upgrade. Since then, I have had roll servo, pitch servo, ptrim servo and now magnetometer failures. Plane has 1700 hours. No mechanical or other issues. I am currently AOG staying in a hotel waiting on a magnetometer, so, not happy.

honestly, I have never owned such an unreliable airplane. Before this I had a Cheyenne I for 14 years and maybe 1 cancelled trip. Before that was a Mooney bravo, same thing, almost never a problem. Is anybody else constantly changing G1000 components? 

[philiplane]

magnetometer failures can happen after 8-10 years in service. I've replaced over a dozen of them on Diamond DA40 and Cirrus Sr22 aircraft. They just stop working with no warning. 

Servo motors don't fail, but the circuit board inside the housing stops communicating with the controller. Then you get a failure message and that axis stops working. It's more common on servos that are exposed to heat and humidity. That's the downside of "smart" servos. They can't operate without the feedback loop, so there is no limp home mode. They just go offline. 

Sometimes the failure is not in a component, it can be in the communication channel to the autopilot controller. The avionics shop should check all those connections first, before replacing parts.

[LANCECASPER]

3 hours ago, wingslevel said:

Bought my Acclaim 2 years ago. 2009, already had .37 software upgrade. Since then, I have had roll servo, pitch servo, ptrim servo and now magnetometer failures. Plane has 1700 hours. No mechanical or other issues. I am currently AOG staying in a hotel waiting on a magnetometer, so, not happy.

honestly, I have never owned such an unreliable airplane. Before this I had a Cheyenne I for 14 years and maybe 1 cancelled trip. Before that was a Mooney bravo, same thing, almost never a problem. Is anybody else constantly changing G1000 components? 

You have the Acclaim that used to be owned by Jonny Pollack, CEO of Mooney. I would make sure that the shop you're using really knows how to diagnose autopilot issues, and isn't just throwing parts at it. The likelihood that all of those servos plus the magnetometer have really failed is a very low percentage. 

[buddy]

From what I understand you should never use a screw gun or electrical device when removing the inspection cover under or near the magnetometer. I have had to replace the roll servo once and both my PFD & MFD other than that I am very happy with my G1000 in my 2005 M20R.

[Schllc]

Well,  only one of these is sort of really related to the G1000, but I agree with the other posters, I’m very dubious that all of these things failed like this, it sounds like something may have happened to affect these components. I have owned more than a few g1000 mooney’s over almost 10 years and I have never had any autopilot issues.  I did change one magnometer as well as one mdf.  But in all honesty being able to swap out a display or an lru in a one or two day repair is worth the cost for the convenience, at least to me. 
I would also believe it’s arguable that if it was Johnny’s old plane, it is probably one of the best maintained planes in the fleet.