As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLED NEW UNIVAIR FAA/PMA CARBURETOR AIR-BOX, P/N U4-601-1 (144348). AFTER 1.3 HOURS FLIGHT TIME THE AIR OUTLET TUBE FLANGE ON THE BOTTOM OF THE BOX WHICH HAD BEEN ATTACHED BY SPOT WELDING, COMPLETELY SEPARATED AT THE SPOT WELDS AND DEPARTED FROM THE AIRCRAFT. IT WAS DISCOVERED DURING THE POST FLIGHT INSPECTION.