As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT ENGINE RAN ROUGH DURING FLIGHT. WAS UNABLE TO SHUT ENGINE DOWN USING MIXTURE CONTROL. FOUND CARBURETOR BOWL SEPARATING FROM CARBURETOR BODY. ALL SCREWS WERE SECURED BY SAFETY TABS AND FACTORY TORQUE SEAL, BUT SCREWS WERE LOOSE. SUBMITTER SUSPECTED IMPROPER TORQUE OF SCREWS DURING OVERHAUL. CARBURETOR REPLACED W ITH OVERHAULED UNIT. FUNCTIONS NORMAL. (X)