As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED NO ALTITUDE FUNCTIONS ON AUTOPILOT. TROUBLESHOOTING REVEALED SEVERAL KAPTON WIRES DISSOLVED UNDER FUEL PUMP AND VENT. REPLACED WIRES AND TESTED GOOD. MAY CAUSE FIRE IF UNDETECTED. SUBMITTER RECOMMENDED INSPECTING WIRE BUNDLE FOR ANY DAMAGED WIRES DUE TO FUEL LEAKS.