As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PER AIRCRAFT ANNUAL INSPECTION, CHECKED THERMOSTATIC VALVE CONDITION. FOUND THE SERIAL NUMBER OF THIS VALVE IS NOT SUBJECT TO INITIAL INSPECTION, BUT FOUND THIS THERMOSTATIC VALVE TO HAVE A LOOSE CRIMP NUT. ALL THERMOSTATIC VALVES NEED TO BE CHECKED OR A NEW DESIGN OF SAFETING CRIMP NUTS.