As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FAILURE CODE AT SHUTDOWN INDICATED FAULT WITH THE COLLECTIVE POTENTIOMETER. A NEW POTENTIOMETER WAS INSTALLED AND NO FURTHER DEFECT REPORTED. IT WAS RECENTLY DISCOVERED THAT THE ROUTING OF AIR CONDITIONING SYSTEM WIRING IN CONTACT WITH THE UNSHIELDED ELECTRICAL HARNESS FOR THE POTENTIOMETER WAS CAUSING SPURIOUS SIGNALS IN THE CONTROL DATA WHICH WERE INTERPRETED AS A PONTENTIOMETER FAILURE. DOZENS OF THESE PONTENTIOMETERS WERE REPLACED. REROUTING THE AIR CONDITIONING WIRING HAS ALMOST ENTIRELY ELIMINATED THE NEED TO REPLACE THESE POTENTIOMETERS. (K)