As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DAILY SYS CHECK, AUTOFEATHER CHECK IS ABORTING TEST ON LT SIDE, SEVERAL ATTEMPTS. NO FAULTS IN CDS. OP'S CHECK OF THE PROPELLER AUTOFEATHER SYS IAW AMM TASK 61-20-00-710-801. OP'S CHECKED GOOD. COULD NOT DUPLICATE. RETURNED TO SERVICE.