As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, THE PILOTS NOTED THE THROTTLE WOULD BIND IN THE IDLE POSITION. INSPECTION REVEALED THE CARBURETOR WAS BINDING. THIS HAS BEEN A RECURRING PROBLEM WITH THIS MAKE OF CARBURETOR, AND WE ARE TOLD IT IS CAUSED BY THE ACCELERATOR PUMP BINDING. THE CARB WAS IN SERVICE ONE MONTH BEFORE THIS PROBLEM PRESENTED.