As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) ENGINE THERMOSTATIC VALVE (VERNATHERM) WAS REMOVED TO DETERMINE PART NUMBER WAS COMPLIANT WITH AD/LYC/78A5. IT WAS FOUND THAT THE VALVE'S P/N 53E22144 WAS NOT APPLICABLE, BUT THE VALVE STILL FAILED THE INSPECTION CRITERIA - LOOSE RETAINING NUT. NOTE: VALVE P/N 53E22144 IS NOT MENTIONED IN SB 318A AS A PROBLEM.