What was found
DURING PRE TAKEOFF RUN, THE IDLE SPEED WOULD DROP TO ABOUT 500 RPM WHEN THE THROTTLE WAS REDUCED TO THE STOP. THIS ENGINE FUEL CONTROL COMBINATION REQUIRES SUBSTANTIAL ADJUSTMENT TO MAINTAIN THE CORRECT IDLE SPEED/MIXTURE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING PRE TAKEOFF RUN, THE IDLE SPEED WOULD DROP TO ABOUT 500 RPM WHEN THE THROTTLE WAS REDUCED TO THE STOP. THIS ENGINE FUEL CONTROL COMBINATION REQUIRES SUBSTANTIAL ADJUSTMENT TO MAINTAIN THE CORRECT IDLE SPEED/MIXTURE.