I had that happen to me in an SR22. It was water in the pitot/static system. In my case, the VSI was jumping even though we were steady, so the autopilot was just trying to follow.
A couple nights ago the exact same thing happened to me. I solved it by applying pitot heat for a while then switching the kap 140 to VS 0, then pitot heat off and finally altitude hold again. The OAT was about 8C
Setting the VS higher makes these problems worse, never better, the KAP 140 is referenced from its own static source and the position of this port is not the best on diamond star aircraft. I fly well maintained and HANGARED 172S SP G1000, this autopilot is my best mate and a rockstar co-pilot. George sometimes settles at a level 100' low, but its predictable and rock solid.
yea dude everytime I've flown with the 140 it's done that and it was with 4 different planes. I think that auto pilot just is plain weaksauce. Several other pilots who rented those planes also tended to agree....
I had that happen to me in an SR22. It was water in the pitot/static system. In my case, the VSI was jumping even though we were steady, so the autopilot was just trying to follow.
wow amazing
A couple nights ago the exact same thing happened to me. I solved it by applying pitot heat for a while then switching the kap 140 to VS 0, then pitot heat off and finally altitude hold again. The OAT was about 8C
never had this issue (thankfully) but sometimes it rocks the plane a tiny bit to the left nd right
Setting the VS higher makes these problems worse, never better, the KAP 140 is referenced from its own static source and the position of this port is not the best on diamond star aircraft.
I fly well maintained and HANGARED 172S SP G1000, this autopilot is my best mate and a rockstar co-pilot. George sometimes settles at a level 100' low, but its predictable and rock solid.
yea dude everytime I've flown with the 140 it's done that and it was with 4 different planes. I think that auto pilot just is plain weaksauce. Several other pilots who rented those planes also tended to agree....