As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THAT WHEN ADJUSTING POWER FOR CRUISE FLIGHT THE ENGINE HAD FLUCTUATIONS WHEN PASSING THROUGH A CERTAIN COLLECTIVE POSITION THAT WERE REPEATABLE IF SELECTING THE POSITION IN QUESTION. UPON SHUTDOWN A FAULT CODE WAS GENERATED INDICATING THE COLLECTIVE POTENTIOMETER WAS FAULTY. A NEW POTENTIOMETER WAS INSTALLED AND NO FURTHER DEFECT NOTED. THIS IS A VERY COMMON FAULT FOR THIS PART THAT EFFECTS THIS MODEL AIRCRAFTS DISPATCH RELIABILITY. (K)