As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON INSTALLING NEW LIFT DETECTION NOTED THAT WHEN WIRED AS ORIGINALLY REMOVED FROM AIRCRAFT, WITH HEAT TURNED ON, DETECTION WAS INOPERATIVE. GROUND FOR HEATER WAS INSTALLED ON COMMON FOR DETECTION; CAUSING A NO POTENTIAL WHEN HEATER TURNED ON.