As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOPILOT ALTITUDE HOLD FUNCTION WAS NOT WORKING PROPERLY. FOUND BOTH KAP 140 EXTERNAL STATIC PORTS BLOCKED. CLEANED PORTS IAW WI-0SB-40-050, STEP 9 USING A 1.5 MM DRILL BIT THROUGH FUSELAGE SHELL FROM INSIDE TO OUTSIDE (BOTH STATIC PORTS). ALSO FOUND ORFICE PN D60-3413-01-00 PLUGGED, CLEANED PLUG AND RAMP TESTED SERVICEABLE. CUSTOMER REPORTED THAT FLIGHT CHECK WAS PERFORMED SATISFACTORY.