I’m glad to hear this isn’t normal—at least in your experience. The answer from the avionics shop that this wasn’t uncommon felt off to me. No other contributing factors that I can recall. Everything operating normally and then out of the blue AP disconnects, disconnect chime, AP fail annunciation. Re-engage 5 seconds later and back to working perfectly. I’ll pay extra attention to make sure GPS isn’t dropping out because I have been in NAV mode, I think, in most of these uncommanded disconnects.

Occasionally, my S-TEC 3100 disconnects during flight with the annunciation AP FAIL. This is not a turbulence-related disconnect and the AP can always be immediately re-engaged without issue. I'd say this happens every 3-4 hours of flight time. I spoke with Wayne at Byerly Aviation and he said this is not uncommon. I'm curious to know if others are seeing this same type of behavior?

The center tank fuel cap on our 690A is leaking. Can these be rebuilt? Is anyone willing to share a .pdf of the parts manual so I can see what part numbers are needed to rebuild it?

Thanks!

I'll probably do the test in the MM next time I have a chance, and not pursue it much further. It's the plane I learned on and it works for me, so it falls into the "ain't broke/ don't fix it" category until proven otherwise.

My brakes are definitely sensitive and I'm chasing a gremlin now where the force required for equal braking is slightly unequal from one side to the other. We've done so much fiddling and caliper swapping that now I have a minor PIO of the nose from left to right on braking, so I'm going to stop messing with it and just fly and relearn my plane. I have no trouble keeping the centerline between the mains, but I get a 2-3 foot side to side jerk of the nose as I first come on the brakes that I didn't used to have.

I didn't notice it in my logbook review, but I'll look again. What would I look for on the aircraft itself?