As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA- AUTOFEATHER ARM LIGHT CAME ON IN CRUISE FLIGHT WHILE NOT SELECTED. APPEARED TO BE ASSOICATED WITH THE SWITCH IN THE POWER LEVER QUADRANT. MAINTENANCE RESEATED THE ADVISORY CONTROL BOX AND CLEANED THE POWER LEVER SWITCHES IN THE QUADRANT. OPERATIONAL CHECKS GOOD. NO PARTS REPLACED.