As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2193, AUTOFEATHER ARM LIGHT FLICKERING AND SHOWING AS "ARM" WITHOUT THE BUTTON BEING SELECTED. DURING CLIMB AND CRUISE. MAINTENANCE REPLACED THE AUTOFEATHER SELECT SWITCH. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.