As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MA-4-5 CARBURETOR AS OVERHAULED BY AVSTAR FUEL SYSTEMS RAN ROUGH DURING TAKEOFF. DURING CAUTIONARY LANDING, FUEL FLOAT FROZE AND ALLOWED CARBURETOR TO FLOOD, WHICH SHUT DOWN ENGINE DURING LANDING ROLL-OUT. FUEL OBSERVED POURING OUT OF CARBURETOR. DISASSEMBLY BY MARVEL SCHEBLER OF MA-4-5 REVEALED FLOAT HEIGHT MISALIGNMENT, FLOAT SHAFT JOURNALS ON THE FLOAT LEVER HAD DEFORMATION, AND FLOAT CONTACTING THE M-509 FLOAT SETTING GAGE WHICH DOES NOT ADHERE TO SERVICE BULLETIN SB-4. CONCLUDED POOR OVERHAUL PROCEDURES BY AVSTAR.