What was found
C/W AD 93-18-03 BY REMOVING TWO-PIECE VENTURI AND INSTALLING CONSOLIDATED FUEL SYSTEM'S ONE-PIECE VENTURI. THEREAFTER, PILOT REPORTED CRUISE FLIGHT FUEL BURN INCREASED FROM 7 GPH TO 9 GPH. INSPECTION OF CARBURETOR AND VENTURI DISCLOSED NO DISCREPANCIES, BUT AS A PRECAUTION, A NEW 46-F10 ONE-PIECE VENTURI WAS INSTALLED AND FUEL CONSUMPTION HAS SINCE RETURNED TO NORMAL.