Hi I've just finished installing a Skyview System with 2 channel autopilot. Went out with a pilot yesterday and carried out a test flight with everything working correctly at 1200ft. The only adjustment I made was to increase turn rate to 2deg/Min otherwise every other autopilot parameter was left at factory default. I handed aircraft (Tecnam P2002 Sierra) back to the owner. Received a phone call later that night saying from the owner saying that everything worked well except when she flew over 5000ft the autopilot ordered a violent pitch up then down and began hunting, porpoising and got progressively worse. She disconnected the autopilot and hand flew from there. She didn't say if she tried to engage the autopilot again once below 5000ft. Has anyone come across this before? Thanks.