As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ONE-PIECE VENTURI INSTALLED TO COMPLY WITH AD 93-18-03. AFTER INSTALLATION, AIRCRAFT WOULD NOT RUN SMOOTHLY, FUEL CONSUMPTION INCREASED ABOUT ONE AND ONE-HALF GALLONS PER HOUR. SUBMITTER STATED THAT THE AD SHOULD HAVE BEEN A MANDITORY INSPECTION AT ANNUAL ONLY.