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 C/W AD 93-18-03 CAUSED DISRUPTION OF FUEL FLOW AND ENGINE WOULD NOT DEVELOP FULL POWER. SINGLE PIECE VENTURI MANUFACTURED BY CONSOLIDATED. P/N CF46-F12 WAS INSTALLED IN MARVEL SCHLEBLER MA3-SPA CARBURETOR TO C/W AD TO REPLACE 2-PIECE VENTURI. AFTER INSTALLATION, ENGINE WOULD NOT DEVELOP FULL POWER RPM AND RAN ROUGH.